two billiard balls that were driven down parallel tracks by a spring gun. One ba

Question

two billiard balls that were driven down parallel tracks by a spring gun. One ball traveled along a flat track, the other along a track with a dip. The apparatus is shown in the figure below. Below are shown 6 graphs and 10 physical quantities. Identify which of the graphs could match each physical quantity if the vertical axis were given the correct scale. The time t =0 occurs just after the balls have been pushed by the spring. Choose the graphs that match each quantity a.-j.If none works, write N. Each graph may be chosen as many times as you like. You may assume friction can be neglected. No explanations are required on this problem.

Explanation / Answer

a)A

b)A

c)D

d)C

e)A

f)A

g)A

h)N (although it would show a gain, it wouldn't be the same as D because energy and velocity are not directly related but energy varies as a square of velocity)

i)A

j)C

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