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Q.

The velocity of projection of a body is increased by 2%. Other factors remaining unchanged, what will be the percentage change in the maximum height attained?

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answer is 4.

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Detailed Solution

We know that,  ym=H=usinθ2g=u2sin2θ2g
∴ΔHH=2Δuu.GivenΔuu=2%
∴ΔHH=2×2=4%
 

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The velocity of projection of a body is increased by 2%. Other factors remaining unchanged, what will be the percentage change in the maximum height attained?