Concept explainers
Return to the Chapter-Opening Question. page 18, and answer it again now.
Try to explain why you may have answered differently the first time.
[Don’t worry about getting the right answer now–you will get another chance later in the Chapter. See also p. 1 of Chapter 1 for more explanation]
Two small heavy balls have the same diameter but one weighs twice as much as the other. The balls are dropped from a second-story balcony at the exact same time. The time to reach the ground below will be.
- (a) twice as long for the lighter ball as for the heavier one.
- (b) longer for the lighter ball, but not twice as long.
- (c) twice as long for the heavier ball as for the lighter one.
- (d) longer for the heavier ball, but not twice as long.
- (e) nearly the same for both balls.
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Physics for Scientists and Engineers with Modern Physics
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