Consider the net work required to stop a moving object. a. What is the net work, in joules, required to stop a crate of mass 60.4 kg that is moving at a speed of 1.96 m/s? b. What is the net work, in joules, required to stop a bullet of mass 8.57 g that is moving at a speed of 424 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.