4. Assume the motion of two sets of balls above going down a track, ball A is on

Question

4.   Assume the motion of two sets of balls above going down a track, ball A is on a straight track and ball b is on a slanted track going down hill. At instant 1, ball A is already moving and ball B is released from rest.

(a) In words, describe the motion of the two balls. Explain.



(b) Ball A and Ball B are at same level at these instants. For each of the following instants, tell whether the speed of ball B is greater than, less than, or equal to the speed of ball A at that instant. Briefly explain the reasoning you use in each case. If you do not have enough information to compare the speeds, state so explicitly.


instant 2




instant 4

Explanation / Answer

From the given figures The ball A is moving with uniform speed whereas the ball B is starting from rest so it is acclerarting. so the speed of the ball increases with the slope of the slanted track. The slant of the track first it small lateron it rises. The speed of the ball A is uniform but the speed of the ball increases so at instant 2 the speed of the ball B is less than the speed of the ball A beacuse it reaches next instant 3 at less distance than A and the instant 4 the vecloity of the ball B is more than the speed of ball A beacuse it covers more distance before instant 5

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