The angle which the velocity vector of a projectile, thrown with a velocity v at an angle θ to the horizontal, will make with the horizontal after time t of its being thrown up is
θ
tan−1(θt)
tan−1(vcosθvsinθ−gt)
tan−1(vsinθ−gtvcosθ)
A
tan−1(vcosθvsinθ−gt)
B
θ
C
tan−1(vsinθ−gtvcosθ)
D
tan−1(θt)
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Solution
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Horizontal velocity of projectile after time t =vcosθ Vertical velocity of projectile after time t=vsinθ−gt Angle at any time t:
tanϕ=vvvh=vsinθ−gtvcosθϕ=tan−1vsinθ−gtvcosθ
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