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Question

If for a given angle of projection, the horizontal range is doubled, the time of flight becomes


A

4 times

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B

2 times

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C

2 times

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D

12 times

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Solution

The correct option is C

2 times


R=u2 sin 2 θg and T=2u sin θg

R u2 and T u (If θ and g are constant ).

In the given condition to make range double, velocity must be increased upto 2 times that of previous value. So automatically time of flight becomes 2 times.


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