Answer True or False 17) Kinetic energy is proportional to speed. 18) The work r
ID: 1498802 • Letter: A
Question
Answer True or False
17) Kinetic energy is proportional to speed.
18) The work required to stretch a spring changes linearly with the amount of stretch.
19) If a force is directed perpendicular to the displacement, no work is done by that force.
20) A force can be exerted on an object and yet do no work.
21) Work is a vector quantity.
22) In an inelastic collision, the initial kinetic energy is less than the final kinetic energy.
23) The impulse delivered to an object is equal to the change in the object's velocity.
24) In a one-dimensional elastic collision of two identical masses, the masses always exchange velocities.
25) In any elastic head-on collision, the relative speed of the two objects after the collision has the same magnitude (but opposite direction) as before the collision, no matter what the masses are.
Explanation / Answer
17) False proportional to square of speed
18) False square
19) True
20) True
21) False
22) False
23) False
24) True
25) False
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