From the top of a cliff 80 meters high, a ball of mass 0.4 kilogram is launched horizontally with a velocity of 30 meters per second. The potential energy of the ball is zero at the bottom of the cliff. a. What are the initial potential, kinetic, and total energies of the ball? b. Sketch the graphs of the potential, kinetic, and total energies of the ball as functions of time until it hits the ground.

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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.