Refer to the tracks in Exercise 107.
(a) Does ball B roll faster along the lower part of track B than ball A rolls along the straighter track A?
(b) Is the speed gained by ball B going down the extra dip the same as the speed it loses going up near the right-hand end€”and doesn€™t this mean that the speeds of balls A and B will be the same at the ends of both tracks?
(c) On track B, won€™t the average speed dipping down and up be greater than the average speed of ball A during the same time?
(d) So, overall, does ball A or ball B have the greater average speed? (Do you wish to change your answer to Exercise 107?)

Exercise 107

Two balls, A and B, are released simultaneously from rest at the left end of the equal-length tracks A and B, as shown. Which ball, A or B, will reach the end of its track first?

Transcribed Image Text:

B