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MHT CET Physics question

PhysicsWork, Energy and PowerMHT CET

A body of mass 'm' begins to move under the action of time dependent force N where and are unit vectors along x and y axis respectively. The power developed by the force in watt at time 't' is [MHT-CET 2020]

Answer: (D)

Solution

, so \vec\vec$

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Question ID VK-062428