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Show how to solve both: Calculate the work done by a crane to lift a 500kg...

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Calculate the work done by a crane to lift a 500kg beam over a height of 50.0 meters? Assume the crane lifts the beam at a constant velocity (Ans:245kJ)

A box of mass 5.00 kg is placed at the top of a smooth inclined plane. The box is released from rest. (a) What is the speed of the box just as it reaches the bottom of the inclined plane? The incline is 1.38 m high and its slope is 2.43 m long. (b) Illustrate the box’s energy at the top and bottom position using bar graphs. (Ans;5.2m/s)

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