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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

A particle of mass 1 kg is projected with an initial velocity 10 ms⁻¹ at an angle of projection 45° with the horizontal. The average torque acting on the projectile, between the time at which it is projected and the time at which it strikes the ground, about the point of projection, in newton-metre, is

Answer: (B)

Solution

. At landing, the vertical component of momentum reverses while the horizontal stays the same: angular momentum at landing 0 (at launch, since the particle starts at the origin). Using range m and the

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Question ID VK-158542