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Questions  

The maximum height attained by a projectile is increased by 5%. Keeping the angle of projection constant, what is the percentage increase in horizontal range?

a
5%
b
10%
c
15%
d
20 %

detailed solution

Correct option is A

If h be the maximum height attained by the projectile thenh = u2sin2θ2g or R = u2sin 2θgRh = 2 sinθcosθ(sin2θ)2 = 4 cotθTherefore ∆RR = ∆hhPercentage increase in R = percentage increase in ym = 5%

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