Which of the following is not a fundamental force?
a. the gravitational force
b. the electromagnetic force
c. the strong force
d. the force of forward motion also known as the inertial force
e. Choose this answer if two of the named forces are not fundamental.
[Ques. 2] A book is resting on a table. How many forces would be in the free-body diagram of the book?
a. one
b. two of the same type
c. two of different types
d. three or more of the same type
e. three or more of at least two different types
[Ques. 3] Which type of force would be the equal and opposite force to a gravitational force?
a. gravitational
b. electromagnetic
c. strong
d. weak
e. It could be any one of the above or some combination of them.
[Ques. 4] A catcher arranges to catch a baseball dropped from a height 50 m above his glove. However, his friends substitute a soft 250 g red grapefruit, so that it will smash apart when he catches it. His glove stops the grapefruit in 0.010 s. What force does the glove exert on the grapefruit?
a. 0.078 3 N
b. 783 N
c. 2 450 N
d. 24 500 N
e. 78 300 N
[Ques. 5] Two experiments are performed. In (A), an 18.0 N force pushes horizontally on a 2.00 kg block that then pushes on a 4.00 kg block. In (B), an 18.0 N force pushes on a 4.00 kg block that then pushes on a 2.00 kg block. Which statement is correct?
a. The acceleration is 3.00 m/s2 in both (A) and (B).
b. The acceleration is 4.50 m/s2 in both (A) and (B).
c. The acceleration is 6.00 m/s2 in both (A) and (B).
d. The acceleration is 9.00 m/s2 in both (A) and (B).
e. The 2.00 kg block has a 9.00 m/s2 acceleration. The 4.00 kg block has a 4.50 m/s2 acceleration.
[Ques. 6] When an acrobat hangs motionless from a pair of rings
a. she has no measurable weight.
b. her weight depends on the angles the ropes make with the ceiling.
c. her weight is reduced by the upward force the rings exert on her.
d. her weight is increased by the upward force the rings exert on her.
e. she exerts a gravitational force on the Earth that is equal to the sum of the forces the rings exert on her.
[Ques. 7] In order to jump off the floor, the floor must exert a force on you
a. in the direction of and equal to your weight.
b. opposite to and equal to your weight.
c. in the direction of and less than your weight.
d. opposite to and less than your weight.
e. opposite to and greater than your weight.
[Ques. 8] The light bulbs in this circuit are connected in
a.
parallel.
b.
series.
c.
neither parallel nor series.
d.
a short circuit.
[Ques. 9] When you drag a toy teddy bear along the floor by a force that is parallel to the floor, the magnitude of the force of friction
a. is independent of velocity or acceleration.
b. increases when the velocity increases.
c. is proportional to the acceleration.
d. decreases when the force parallel to the floor increases.
e. increases when the force parallel to the floor increases.
[Ques. 10] You hold a tennis racket in your hand. On top of the racket you have balanced a ball. Which statement is true?
a. The force of your hand on the racket and the force of the ball on the racket are equal and opposite.
b. The force of the racket on your hand and the force of the ball on the racket are equal and opposite.
c. The force of your hand on the racket and the force of the racket on the ball are equal and opposite.
d. The force of the racket on your hand and the force of the racket on the ball are equal and opposite.
e. The force of your hand on the racket and the force of the racket on your hand are equal and opposite.