Concept explainers
Return to the Chapter-Opening Question, p. 248, and answer it again now. Try to explain why you may have answered differently the first time.
CHAPTER-OPENING QUESTION—Guess Now!
A solid kill and a solid cylinder roll down a ramp. They both start from rest at the same time. Which gets to the bottom first?
- (a) They get there at the same time.
- (b) They get there at almost exactly the same time except for frictional differences.
- (c) The ball gets there first.
- (d) The cylinder gets there first.
- (e) Can’t tell without knowing the mass and radius of each.
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