physics student with a mass m of 50.0 kg is doing push-ups, as shown in the figure below. In addition to her weight, she is supported by the force at her toes and her hands. With each push-up her center of mass rises by 25 cm. You can treat her as a particle of mass m. What is her useful power output if she does 18 push-ups in one minute? Assume she does only work when pushing up, not when lowering herself again

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