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Question

A stone is thrown vertically upwards with an initial velocity of 30 m/s. The time taken for the stone to rise to its maximum height is
[Take g=10 m/s2]

A
4 sec
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B
2 sec
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C
3 sec
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D
6 sec
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Solution

The correct option is C 3 sec
As we know that, at maximum height, velocity of the stone will be zero i.e. v=0
Give, initial velocity of stone u=30 m/s
Time taken by stone to rise to its maximum height is T=ug=3010=3 sec

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