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Question

A truck is moving horizontally with velocity v. A ball thrown vertically upward with a velocity u at angle θ to the horizontal from the truck relative to it. The horizontal range of the ball relative to the ground is

A
2×(v+ucosθ)usinθg
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B
2×(v+usinθ)ucosθg
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C
2×(vucosθ)usinθg
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D
2×(vusinθ)ucosθg
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Solution

The correct option is A 2×(v+ucosθ)usinθg
Velocity of truck=v
velocity of truck =u
At an angle θ ,time of flight:
uy=uygt
0=uygT2
T=2uyg=2usinθg
Range=(ux+v)×T=(v+ucosθ)×2usinθg

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