Question

a body is projected in the air that the horizontal range covered by the body is equal to the maximum vertical height attained by the body during the motion find the angle of projection

Answer 1

HELLO ,

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Given that H= R

H = u2 sin2 θ /2g
​R = u2sin 2 θ /g 

so, u2 sin2 θ /2g = u2sin 2 θ /g 
as sin 2θ  = 2 sinθ cosθ 

so u2 sin2 θ /2g =  2u2sinθcosθ  /g

  we get  tan θ = 4
        or,      θ= tan-1 (4)


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Hope it helps u! !!!

# Nikky