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JEE Main Physics question

PhysicsMotion in a PlaneJEE Main

A particle is projected from a point with a velocity at an angle of elevation . At a certain point , the particle moves at right angles to its initial direction. Then

Answer: (B),(D)

Solution

Since the velocity at is perpendicular to the initial velocity, , giving $θ+(vθ-gt)vθ=0⇒

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Question ID VK-158039