Consider a situation where two moving objects collide and rebound from each other.Kinetic energy
a. is definitely conserved.
b. is definitely not conserved.
c. may or may not be conserved, depending on the nature of the collision.
d. none of the above
[Ques. 2] If a force on an object is aimed perpendicular to the direction of the object's velocity, the force does
a. no work. b. positive work.
c. negative work. d. any of the above.
[Ques. 3] If a force on an object is aimed in the direction of the object's velocity, the force does
a. no work. b. positive work.
c. negative work. d. any of the above.
[Ques. 4] If a force on an object is aimed opposite the direction of the object's velocity, the force does
a. no work. b. positive work.
c. negative work. d. any of the above.
[Ques. 5] Work is done on an object when
a. it moves in a circle at constant speed.
b. it is accelerated in a straight line.
c. it is carried horizontally at constant speed.
d. all of the above
[Ques. 6] What are the SI units of momentum?
a. kg m/s b. pascals
c. joules d. watts
[Ques. 7] The linear momentum of a truck will be greater than that of a bus if
a. the truck's mass is larger than the bus's but its speed is the same.
b. the truck's speed is larger than the bus's but its mass is the same.
c. the truck's mass and speed are both larger than the bus's.
d. any of the above.
[Ques. 8] Kinetic energy is conserved in
a. an inelastic collision.
b. an elastic collision.
c. any collision where two objects rebound off each other.
d. none of the above.
[Ques. 9] What does it mean for a physical quantity in a system to be conserved?
a. It is used in the most efficient manner possible.
b. It stays in its original state forever.
c. The total amount of it in the system stays constant.
d. none of the above.
[Ques. 10] A barrel rolling down an inclined ramp has only kinetic energy.
a. True
b. False
Indicate whether the statement is true or false
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