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JEE Main Physics question

PhysicsWork, Energy and PowerJEE Main

A particle of mass 0.2 kg is moving in one dimension under a force that delivers a constant power 0.5 W to the particle. If the initial speed (in ms⁻¹) of the particle is zero, the speed (in ms⁻¹) after 5 s is

Answer: 5

Solution

Power is constant, so Pt = work done = ΔKE = ½mv² (since initial speed is zero).

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Question ID VK-154208