A child with a mass of 37.0 kg on a swing is 1.80 m above the ground at maximum amplitude. There is a mud puddle under the swing when it is in rest position. 12. a) Find the child's potential energy at 1.80 m. b) How high is the child above the puddle when she is moving at a speed of 2.8 m/s?

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Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.