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Question

From a 200m high tower, one ball is thrown upwards with speed of 10m/s and another is thrown vertically downwards at the same speed simultaneously. The time difference of their reaching the ground will be nearest to

A
12s
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B
6s
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C
2s
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D
1s
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Solution

The correct option is A 2s
The ball thrown upward will have zero velocity in1s. It returns back to thrown point in another 1s with the same velocity as second. Thus the difference will be 2s.

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