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Question

A ball is dropped from the top of a building. The ball takes 0.5 s to fall past the window 3 m in length at certain distance from the top of the building. (g=10ms−2)
Speed of the ball as it crosses the top edge of the window is

A
3.5ms1
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B
8.5ms1
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C
5ms1
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D
12ms1
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Solution

The correct option is A 3.5ms1

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