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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

Two masses m₁ = 1 kg and m₂ = 2 kg are connected by a light inextensible string and suspended by means of a weightless pulley. Assuming that both masses start from rest, the distance travelled by the centre of mass in 2 s is (take g = 10 m/s²)

Answer: (A)

Solution

a = (m₂ − m₁)g/(m₁+m₂) = 10/3 ms⁻² (m₂ accelerates down, m₁ up). The centre-of-mass acceleration = [m₁(−a) +

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Question ID VK-152837