...Force   Multiple Choice...
...is not a force exerted on the...
...scale?  A. a contact force due to the...
...floor B. a contact force due to the...
...    3. The force that holds charged...
...together is  A. gravitational force. B. electromagnetic force. C. weak...
...A. gravitational force. B. electromagnetic force. C. weak interaction. D. strong...
...true?  A. the electrical force on A due...
...as the gravitational force on B due...
...A B. the gravitational force on C due...
...as the gravitational force on A due...
...C C. the rope force on A due...
...as the electrical force on B due...
...A D. the rope force on B due...
...as the gravitational force on A due...
...  6.  The force that holds the...
...  A.  gravitational force. B.  electromagnetic force....
...force. B.  electromagnetic force. C.  weak interaction....
...D.  strong nuclear force.     7. ...
...  7.  The force that causes an...
...  A.  gravitational force. B.  electromagnetic force....
...force. B.  electromagnetic force. C.  weak interaction....
...D.  strong nuclear force.     8. Which...
...vector quantity?  A. volume B. force C. speed D. time E. length...
...is the net force of the beaker...
...a downward gravitational force of 12 kN,...
...an upward contact force due to the...
...kN, another contact force due to the...
...and a drag force due to air...
...is the net force acting on the...
...exerts and upward force of 25.0 N...
...exerts an upward force of 500 N....
...500 N. What force does the floor...
...correct free body force diagram for the...
...produce a lift force that is perpendicular...
...and a drag force that is parallel...
...a forward thrust force of 2,000 N....
...A.  the net force on the airplane...
...B.  the net force on the airplane...
...C.  the net force on the airplane...
...D.  the net force on the airplane...
...E.  the net force on the airplane...
...produce a lift force that is perpendicular...
...and a drag force that is parallel...
...a forward thrust force of 2,000 N....
...true?  A. the lift force on the airplane...
...zero B. the drag force on the airplane...
...zero C. the lift force on the airplane...
...upward D. the drag force on the airplane...
...downward E. the drag force on the airplane...
...  18. The net force on a moving...
...pulling with a force greater than the...
...what is the force in the connection...
...surface requires  A. less force than is needed...
...surface. B. the same force as is needed...
...the surface. C. more force than is needed...
...the surface. D. a force equal to the...
...the object. E. a force opposite to the...
...to the normal force.     22. Five...
...pushing with a force of 10.0 N....
...friction), then the force in the connection...
...What is the force required to lift...
...    25. A force of 15 N...
...kg box. Another force of 42 N...
...box. The net force on the 4.0...
...what is the force on each eyebolt...
...30. Given that a force vector extends from...
...31. Given that a force vector extends from...
...earth. Draw a force diagram for the...
...true?  A. the gravitational force on the rock...
...and the gravitational force on the earth...
...pairs B. the gravitational force on the rock...
...and the contact force on the earth...
...pairs C. the contact force on the earth...
...and the gravitational force on the earth...
...pairs D. the gravitational force on the earth...
...and the contact force on the earth...
...pairs E. the contact force on the earth...
...and the contact force on the rock...
...and opposite?  A. the force of gravity on...
...earth and the force of gravity on...
...mass B. the contact force on the mass...
...and the contact force on the table...
...the mass C. the force of gravity on...
...and the contact force on the table...
...mass D. the contact force on the mass...
...table and the force of gravity on...
...the mass E. the force of gravity on...
...and the contact force on the mass...
...D. always involve gravitational force as one partner....
...108 meters. The force of gravity on...
...the earth. The force of gravity on...
...is the gravitational force between two 5.00...
...is the gravitational force between two nuclei,...
...1011 meters. The force of gravity on...
...  52. When a force is called a...
...called a "normal" force, it is  A. the...
...is  A. the usual force expected given the...
...a system. B. a force that is perpendicular...
...given location. C. a force that is always...
...vertical. D. a contact force perpendicular to the...
...objects. E. the net force acting on a...
...  A.  the force of gravity on...
...earth and the force of gravity on...
...B.  the contact force on the mass...
...and the contact force on the table...
...mass C.  the force of gravity on...
...and the contact force on the table...
...mass D.  the force of gravity on...
...and the contact force on the mass...
...E.  the contact force on the mass...
...table and the force of gravity on...
...from the net force on the system....
...is the normal force of the floor...
...0.600. What horizontal force is required to...
...  57. A friction force  A. is a contact...
...A. is a contact force that acts parallel...
...B. is a normal force between contact surfaces....
...What is the force of friction if...
...if a horizontal force of 550 N...
...0.800. What horizontal force is required to...
...horizontally with a force of 452 N....
...horizontally with a force of 351 N....
...    63. A force of 451 N...
...What is the force of friction on...
...What is the force exerted on the...
...to supply the force required to slide...
...require the least force to move it? ...
...and exerts a force T1 and a...
...and exerts a force T2. The scale...
...What is the force that the person...
...70.  The fundamental force that governs the...
...  A.  strong force. B.  weak force....
...force. B.  weak force. C.  electromagnetic force....
...force. C.  electromagnetic force. D.  gravitational force....
...force. D.  gravitational force.     71. ...
...71.  The fundamental force that governs the...
...  A.  strong force. B.  weak force....
...force. B.  weak force. C.  electromagnetic force....
...force. C.  electromagnetic force. D.  gravitational force....
...force. D.  gravitational force.     72. ...
...72.  The fundamental force that is the...
...  A.  strong force. B.  weak force....
...force. B.  weak force. C.  electromagnetic force....
...force. C.  electromagnetic force. D.  gravitational force....
...force. D.  gravitational force.     73. ...
...73.  The fundamental force that is the...
...  A.  strong force. B.  weak force....
...force. B.  weak force. C.  electromagnetic force....
...force. C.  electromagnetic force. D.  gravitational force....
...force. D.  gravitational force.     74. ...
...  74.  A force of 15.2 N...
...with a second force to produce a...
...produce a total force vector of magnitude...
...  75.  A force of 3.8 N...
...with a second force directed along the...
...produce a total force vector of magnitude...
...  76.  A force of 3.8N directed...
...with a second force directed along the...
...produce a total force vector of magnitude...
...y-component of a force vector is -15.0...
...D.  The net force on the plane...
...B.  The net force on the plane...
...wind applies a force of 155 N...
...of the contact force applied by the...
...  A.  Normal force on the box...
...box. B.  Normal force on the box...
...and the normal force on the table...
...box. C.  The force of kinetic friction...
...box and the force applied to the...
...We know the force of the boy...
...weight and normal force are equal in...
...weight and normal force are equal in...
...We know the force of the boy...
...boy applying a force of 32 N...
...the box. A force of friction of...
...box’s motion.  What force does the box...
...Without knowing the force the wind applies,...
...  A.  Normal force, weight, static friction....
...friction. B.  Normal force, weight, force of...
...Normal force, weight, force of the conveyor...
...belt C.  Normal force, weight, force of...
...Normal force, weight, force of the conveyor...
...friction D.  Normal force and weight.  ...
...  A.  Normal force and weight B. ...
...weight B.  Normal force, weight, static friction,...
...weight, static friction, force of the conveyor...
...belt C.  Normal force, weight, static friction,...
...friction. D.  Normal force, weight, static friction...
...applies a horizontal force to your 2.0...
...respectively. With what force must your friend...
...each with a force of 150 N,...
...ice.  If the force of the ice...
...  90.  A force of 15.2 N...
...with a second force to produce a...
...produce a total force vector of magnitude...
...segment A and the force that the worker...
...93.  The fundamental force that is the...
...  A.  strong force B.  electromagnetic force...
...force B.  electromagnetic force C.  weak force...
...force C.  weak force D.  gravitational force...
...force D.  gravitational force     94. ...
...The static friction force on an object...
...the kinetic friction force on it under...
...than the normal force on it. D. ...

...forming the motivating force behind all human...

...81) The attractive force between two atoms...

...The meaning of force The meaning of...
...*The law of force pairs (Newton's third...
...gravitational mass. Words. Force is one of...
...problem is that force is an action,...
...another body, (i.e., force is a verb)....
...“A exerts a force on B” rather...
...themselves, (e.g., the “force of gravity” is...
...is “exerts a force on,” not simply...
...on,” not simply “force.” Mass is used...
...of the word force, to the great...
...“Newton's law of force pairs” over “Newton's...
...is called a force. We say “A...
...“A exerts a force on B” whenever...
...ask, “Does a force act on this...
...What is the force by, and what...
...when is the force being exerted, and...
...it have a force on it? How...
...“A exerts a force on B” means...
...think of a force as simply a...
...is proportional to force a ? F...
...by more than force alone. Hit several...
...to the same force. You might state...
...that if the force doesn't change, then...
...any units for force. The unit of...
...The unit of force is called the...
...defined as that force which, when acting...
...a, to a force is determined by...
...determined by the force and by the...
...F means net force, and the directions...
...side. Despite your force on the body,...
...You exert a force on the table,...
...examples, this net force is zero. If...
...small residual net force accelerates the body,...
...F/m means net force, not any one...
...means the gravitational force on that body....
...is the net force exerted by the...
...about the “drive force”: Show it acting...
...of the net force? Is the drive...
...Is the drive force zero? What if...
...the law of force pairs by asking...
...be just one force. Forces always come...
...member of a force pair is, the...
...the law of force pairs. Now return...
...direction of the force by the drive...
...direction of the force by the road...
...found the drive force: The road exerts...
...between the net force and the drive...
...and the drive force. Discuss other similar...
...a list of force pairs (Figures 4.13...
...forces are actual “force pairs,” and which...
...Chapter 3 covers force, mass, weight, Newton's...
...the law of force pairs, and much...
...exercises 1. A force must be exerted...
...must be a force on you. Newton's...
...must have a force on it. 4....
...do not contain force. We will see...
...is no net force on the book...
...is a large force in the forward...
...is a smaller force in the backward...
...of the large force is three times...
...of the smaller force. 7. Since gravity...
...is the only force acting on the...
...ball, the net force on the ball...
...of the net force. Acceleration and net...
...Acceleration and net force are always in...
...to zero net force. For example, a...
...to zero net force. The object has...
...has no net force on it. 9....
...to zero net force. For example, an...
...downward, and perpendicular force by the table...
...has no net force on it. 10....
...floor exerts a force on your feet,...
...because the net force on you is...
...be the only force on the wall....
...accelerate, the net force on the wall...
...must be another force (provided by the...
...have a net force on it, to...
...has zero net force on it. So...
...the larger net force on it. 13....
...has zero net force on it. The...
...the larger perpendicular force on it. 14....
...much bigger drive force. Each vehicle has...
...has zero net force on it. 2...
...2 16. Net force = 60 N...
...kick, the net force will be 6...
...rest, the net force becomes zero. 17....
...to balance the force of gravity. 2...
...19. The net force is zero, because...
...20. The drive force must be 500...
...the net horizontal force zero. 21. Since...
...26. The net force on the apple...
...zero. The net force on the falling...
...downward. The net force on the apple...
...because the only force on the apple...
...27. The upward force by your hand...
...because the net force on the apple...
...lowering), the upward force by your hand...
...and the downward force of gravity have...
...surface, because the force of gravity on...
...the law of force pairs. 33. False....
...exerts a backward force (toward the rear)...
...car. This backward force is just as...
...as the forward force by the car...
...truck (law of force pairs). 35. The...
...rifle exerts a force on the bullet...
...an equal backward force on the rifle...
...the law of force pairs). This backward...
...pairs). This backward force causes the recoil....
...and Earth's gravitational force pulls downward. These...
...not form a force pair. The other...
...of the two force pairs are: (1)...
...The apple's gravitational force pulling upward on...
...be exerting a force on something (the...
...the law of force pairs. 39. Yes,...
...book. Earth's gravitational force pulls downward on...
...part of one force pair. 44. Two...
...forces: The upward force by your hand...
...and the downward force by Earth's gravity...
...opposite; the upward force by your hand...
...a 1 N force on the apple....
...The law of force pairs says that...
...must exert a force of 1 N...
...48. The drive force is needed to...
...a large frictional force, acting backward, in...
...the road's perpendicular force (upward). The net...
...(upward). The net force is backward. For...
...and the perpendicular force. The net force...
...force. The net force is strongest in...
...a forward drive force during a relatively...
...York; no drive force would be needed...
...and a backward force would slow the...
...the forward drive force on the runner....
...is the frictional force. Solving for F,...
...the downward net force to half of...
...The net downward force is F =...
...the net downward force is F =...
...means “the upward force due to air...
...The net downward force is F =...
...the net downward force is F =...
...means “the upward force due to friction.”...
...boxes. The net force F on the...
...than the net force f on the...
...0.5 m/s2. frictional force = net horizontal...
...= net horizontal force = ma =...
...is the net force. Thus the drive...
...Thus the drive force must be 500...
...500 N drive force. 13. The wall...
...you with a force of 60 N....
...a 30,000 N force on the car,...
...up, since the force is in the...
...a 100 N force. 20. The net...
...20. The net force on the brick...
...Thus the upward force by the table...
...(see diagram below): force by table =...
...the law of force pairs, the brick...
...a 140 N force, downward. Table pushing...

...4 review questions Force 1. How can...
...is exerting a force on another body?...
...an object have force? Can an object...
...object exert a force? Can an object...
...object be a force? Can an object...
...object feel a force? 3. List at...
...is a resistive force? Give two examples....
...differently to a force of 1 N?...
...is the net force if the two...
...as the net force on the object?...
...increase the net force on an object,...
...double the net force? As you increase...
...Find the gravitational force on a 1...
...15. Draw a force diagram showing the...
...Find the net force on the apple....
...16. Draw a force diagram showing the...
...during liftoff. Which force is largest? What...
...of the net force? 17. Where is...
...larger? Law of Force Pairs 18. Describe...
...exert a gravitational force on Earth? How...
...direction is this force? 20. Describe the...
...member of the force pair for each...
...forces: the normal force on a book,...
...an apple, the force by a bat...
...a baseball, the force by a baseball...
...22. Draw a force diagram showing the...
...How would this force diagram be altered...
...does the forward force on a car...
...is the forward force (the force that...
...forward force (the force that moves the...
...Is the net force zero? Is the...
...difference between the force that propels a...
...and the forward force that propels airplanes...
...automobiles? conceptual exercises Force 1. Is any...
...1. Is any force exerted on you...
...2. Is any force exerted on you...
...exerts a magnetic force on the ball....
...exerting a horizontal force on the ball?...
...high-speed bullet contain force? Does a stick...
...of dynamite contain force? Newton’s Law of...
...of the net force on the book...
...you exert a force on an object...
...as strong a force on the same...
...exertion of each force? 7. A ball...
...of the net force on the ball...
...Are the net force and the acceleration...
...have no net force acting on it?...
...have no net force acting on it?...
...floor exert a force on your feet?...
...the only horizontal force on the wall?...
...about the net force on the wall?...
...the larger net force acting on it?...
...a larger net force exerted on it?...
...the larger normal force exerted on it?...
...the larger drive force exerted on it?...
...larger air resistance force? The larger net...
...The larger net force? 15. A 3...
...a 60 N force. Find the rock’s...
...that a frictional force of 6 N...
...Find the net force on the rock...
...about the net force on the rock...
...must be the force of air resistance...
...The total resistive force on the car...
...Find the net force on the car...
...find the drive force on the car....
...of the net force on an apple...
...or the upward force by your hand?...
...space? Law of Force Pairs 32. “Planet...
...just as much force as the boulder...
...car exert any force on the truck?...
...truck exert any force on the car?...
...so, is this force weaker or stronger...
...stronger than the force that the car...
...exerts the stronger force? Which has the...
...has the larger force exerted on it?...
...form a single force pair? If not,...
...then for each force, describe the other...
...member of that force’s force pair. 38....
...of that force’s force pair. 38. A...
...anything exerting a force on it? How...
...it exerting a force on anything? How...
...push (exert a force on) me? Which...
...on) me? Which force is stronger—or does...
...pitcher exerts a force on a baseball...
...member of the force pair. 41. A...
...member of the force pair. 42. As...
...“weight” is a force, and force is...
...a force, and force is an interaction....
...part of one force pair? 44. Continuing...
...strong is Earth’s force on the apple?...
...how strong a force does the apple...
...object exerting a force on Earth. The...
...states that no force is needed to...
...why is a force needed to keep...
...brakes. Draw a force diagram of the...
...of the net force? Draw a force...
...force? Draw a force diagram for a...
...is the net force stronger? 50. Why...
...an external horizontal force act on the...
...direction of this force during each part...
...pavement with a force of 250 N....
...be the frictional force between her shoes...
...6. How much force must a pitcher...
...7. Find the force acting on a...
...is the frictional force on the firefighter?...
...that the net force on the black...
...than the net force on the white...
...and the frictional force by the ground...
...large a forward force must the road...
...The Law of Force Pairs 13. Wearing...
...wall with a force of 50 N....
...back with a force of 60 N....
...behind, exerting a force of 30,000 N...
...direction, is the force that the truck...
...a 100 N force on a brick...
...table. With what force, and in what...
...hand? Draw a force diagram similar to...
...arrow representing each force acting on the...
...is the net force on the brick?...
...brick? Find the force (how big and...

...do 1) A "force" could be best...
...the meaning of "force"? A) A body's...
...A) A body's force is the tendency...
...body exerts a force on another body...
...accelerate. C) The force of a moving...
...distance. D) The force that a body...
...do. E) A force is a change...
...with the same force. The lead block...
...exert the same force on these two...
...relation between acceleration, force, and mass, an...
...proportional to the force on it and...
...proportional to the force on it and...
...proportional to the force on it and...
...proportional to the force on it and...
...contains. B) the force exerted on it...
...10 newtons of force. If the book...
...10 newtons of force. The frictional force...
...force. The frictional force on it is...
...a 20 newton force on the ball....
...newtons. The net force on the ball...
...a 30 newton force on the ball....
...directions, the net force on the object...
...4.3 20) The force needed to maintain...
...body. D) the force required to stop...
...A) the net force on it is...
...D) the net force on it is...
...E) the net force on it is...
...A) the net force on the rock...
...B) the net force on the rock...
...C) the net force on the rock...
...D) the downward force of gravity is...
...by the upward force of air resistance....
...A) the net force on it is...
...hand. The net force on the apple...
...25) Is any force exerted on you...
...A) No, no force acts as long...
...is a forward force on you, along...
...is a backward force on you, opposite...
...is a sideways force on you. E)...
...there is a force on you but...
...direction of this force because the question...
...there is a force on a body,...
...there is a force on a body,...
...there is a force on a body,...
...there is no force on a body,...
...there is no force on a body,...
...as much net force is exerted on...
...upward, the net force on the ball...
...the moon. The force of gravity on...
...newtons. The net force on the rocket,...
...floor. Regarding the force by the floor...
...there is no force by the floor...
...is an upward force by the floor...
...feet, and this force causes you to...
...is an upward force by the floor...
...is a downward force by the floor...
...feet, and this force causes you to...
...is an downward force by the floor...
...A) A frictional force is also exerted...
...table, and this force is equal and...
...to the pushing force. B) The table...
...table exerts a force on Mary, and...
...Mary, and this force is equal and...
...to the pushing force. C) Very massive...
...inertia. D) The force of gravity pulls...
...table, and this force cancels the pushing...
...cancels the pushing force. E) The table...
...Mary with a force that is even...
...than Mary's pushing force. Answer: A Page...
...of the word "force," the horizontal push...
...not really a force. D) Frictional forces...
...produce a net force of zero. E)...
...Newton's law of force pairs says that...
...an opposite "reaction force" by the table...
...and this reaction force keeps the table...
...tree branch. The force by the apple...
...forces forms a force pair, or action-reaction...
...Newton's law of force pairs? A) Gravity...
...branch. The net force on the apple...
...Newton's law of force pairs says that...
...in pairs. One force acting on the...
...is the other force that forms a...
...that forms a force pair with the...
...47) Consider the force by a baseball...
...The law of force pairs says that...
...says that this force is one of...
...glove, i.e. the force by the player's...
...ball. C) the force by the glove...
...D) the frictional force by the ground...
...E) the muscular force in the player's...
...arms, i.e. the force by the player's...
...floor, the forward force by you on...
...to the backward force by the table...
...because A) the force by you on...
...larger than the force of the table...
...4.5 49) One force acting on a...
...member of the "force pair" ? A)...
...apple. C) The force of gravity by...
...apple. D) The force of gravity by...
...Earth. E) The force of gravity by...
...4.5 50) One force acting on your...
...member of the "force pair" ? A)...
...A) The gravitational force by your body...
...Earth. B) The force by the surface...
...body. C) The force by Earth pulling...
...body. D) The force by your body...
...E) The gravitational force by your body...
...a forward drive force of 500 N....
...500 N. The force of air resistance...
...N. The net force on the car...
...a forward drive force of 500 N....
...500 N. The force of air resistance...
...direction of the force of air resistance...
...road. The net force on the auto...
...the forward drive force on the auto?...
...C) The drive force is actually zero...
...constant speed. One force that acts on...
...a forward drive force of 1000 newtons....
...road. The net force on this auto...
...a forward drive force of 1000 newtons....
...level road. The force due to gravity...
...find the "net force" on an automobile,...
...of the net force, do we need...
...internal and external force must be included....
...Newton's law of force pairs. D) No,...
...only the drive force needs to be...
...the law of force pairs. C) Galileo's...
...62) The "drive force" that pushes a...
...63) The "drive force" that pushes a...
...tires. C) the force of the engine...
...tires. D) the force of the expanding...

...motion. Describe a force vector in relation...
...muscles work as force couples to produce...
...weights Friction: A force between moving surfaces...
...Direction of muscular force on joint Changes...
...by an external force. Inertia: A property...
...proportional to the force causing the movement....
...the movement. Greater force + stronger acceleration...
...plus velocity Momentum: Force applied to increase...
...The greater a force, the greater its...
...counterforce Ground reaction force (GRF): Resistance from...
...Resistance from ground FORCE Force vector: Size...
...from ground FORCE Force vector: Size and...
...and direction of force Muscular force measured...
...of force Muscular force measured by Point...
...site Direction of force: line of muscular...
...pull Magnitude of force: strength of contraction...
...contraction Types of force Linear Forces applied...
...in same plane Force in either same...
...a third resultant force Torque Rotational motion...
...counterpart of linear force Moment arm Perpendicular...
...at 90 degrees Force couple Two parallel...
...turning a wheel) Force couples produce motion...
...of contraction affects force it generates As...
...generates As muscular force increases, speed of...
...bike) As muscular force decreases, speed of...
...machine that magnifies force and converts force...
...force and converts force to torque Every...
...pivots Effort (E): Force that moves lever...
...First-class lever: Favors force over distance Second-class:...
...Favors distance over force Levers in human...
...Muscle contraction produces force Mechanical advantage of...
...that can balance force and distance Examples:...
...> RA Favors force over speed and...
...and distance over force Examples: brooms, bats...
...Unstable equilibrium Minimal force causes COG to...
...laws of motion Force Levers Activities: Review,...
...Efficient use of force in pressure applications...

...Law 30.2The Magnetic Force Between Two Parallel...
...Hence, the magnetic force on wire 2...
...wire 1 feels force up ×into the...
...Q30.4 No total force, but a torque....
...direction, which exerts force in the ikj×=?...
...makes a ikj×?=+ej force of equal magnitude...
...exerts a net force of attraction on...
...which exerts a force of repulsion on...
...so the gravitational force acting on the...
...other with a force equal to the...
...m JK The force on the particle...