sun, its potential energy is high and its kinetic energy low, reduced speed keeping pace with gravitational force. Drop a ball: Since the ball is in free-fall, the only force acting on it is gravity. Therefore, we can use the principle of conservation of mechanical energy - initially the ball has potential energy and no kinetic energy.

Paypal combo listDec 13, 2020 · This energy transformation also holds true for a pendulum, as illustrated in the diagram. As a pendulum swings, its potential energy converts to kinetic and back to potential, as illustrated in Figure 1. Figure 1. A swinging pendulum whose potential energy is converted into kinetic energy and back during the course of a swing from left to right.

(a) The total energy of the system equals the potential energy and the kinetic energy is zero, which is found at the highest point the particle reaches. (b) The particle is midway between the highest and lowest point, so the kinetic energy plus potential energy bar graphs equal the total energy.