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A person of mass 75 kg carries a block of mass 15 kg from ground to the top of a tower 10 m high in 150 sec. The person exerts a constant power throughout this duration and his power-time graph D is as shown in Figure. If the person- carries the same object in a time 300 sec instead of 150 sec by exerting a constant power, the correct power time graph will be :

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Detailed Solution

$P = \frac{dW}{dt} \Rightarrow W = \int Pdt = Area of P - t graph$

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