A jumper with a mass of 90 kg is held at rest at the top of...

A jumper with a mass of 90 kg is held at rest at the top of a 100 m high ramp. The jumper is then released to water. (The gravitational field strength is 9.8 m/s2 )

Calculate the change in gravitational potential energy of the jumper when he reaches the ground (the point Y) in kilojoule. How would you calculate the magnitude of kinetic energy of the jumper at point Y? (Assume no energy is transferred or lost during). A motorized lift is used to take the jumper back up to the top of the ramp again. It takes 1.5 minutes to lift the jumper to the top with respect to same level of Y. Determine the power consumed by (in kW) the motor. Interpret the idea of ‘law of conservation of mechanical energy’ for this motion and write energy conversions (a) at ground level (b) at top from where he jumps down.

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genius_generous answered 1 year ago

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