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Questions  

The maximum height reached by projectile is 4 m. The horizontal range is 12 m. The velocity of projection in ms-1 is (g is acceleration due to gravity)
 

a
5g/2
b
3g/2
c
13g/2
d
15g/2

detailed solution

Correct option is A

tan⁡θ=4HR=4×412=43 ⇒ sin⁡θ=45 H=u2sin2⁡θ2g⇒ u=2gHsin⁡θ=2×g×44/5=5g2

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Similar Questions

Assertion : When the velocity of projection of a body is made n times, its time of flight becomes n times.

Reason : Range of projectile does not depend on the initial velocity of a body.


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