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Questions  

A particle is projected from the ground with an initial speed of v at an angle θ with horizontal. The average velocity of the particle between its point of projection and highest point of trajectory is:

a
v21+2cos2θ
b
v21-4cos2θ
c
v21+3cos2θ
d
v cosθ

detailed solution

Correct option is C

Average velocity = DisplacementTime     vav = H2+R24T2----(i)Here, H = maximum height = v2sin2θ2gR = range = v2sin2θgand T = time of flight = 2v sinθgvav = v21+3 cos2θ

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