Refer to the tracks in the previous problem.
a. Does the ball on B roll faster in the dip
than the ball rolling along track A?
On track B, is the speed gained going
down into the dip equal to the speed lost
going up the dip? If so, do the balls then
have the same speed at the ends of both
tracks?
Is the average speed of the ball on the
lower part of track B greater than the
average speed of the ball on A during the
same time?
So overall, which ball has the greater
average speed? (Do you wish to change
your answer to the previous exercise?)