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Q. |
A piece of paper and a cricket ball are dropped from the same height. Under which of the following conditions do both reach the surface simultaneously? |
A. | They must have the same volume |
B. | They must have the same density |
C. | They must have the same mass |
D. | They must be dropped in vacuum |
Answer» D. They must be dropped in vacuum | |
Explanation: When a piece of paper and a cricket ball are dropped from the same height, they reach the surface at different time because the shape of the paper is more flat and it behaves like a parachute causing more air resistance acting on it with respect to the ball. But, in order to reach the surface at the same time by both the |
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