in this example the energy ____ by the hoist is equal to the ____ flowing through its motor multiplied by the ____ difference across the motor. This ____ is transferred from ____ energy to ____ energy as the load is moved and is then stored as ____ potential energy as the loads ____ increases. Some energy is lost as ____ due to ____ in the motor. In this example the ____ Alex does is equal to the ____, caused by his weight, multiplied by the ____ he travels vertically. If he has to carry more ____ the force pulling him towards the earths centre of ____ increases and he would have to do more work. His muscles will be transferring ____ energy into kinetic ____ as he moves, this kinetic energy is then stored as gravitational ____ energy as his height increases.

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