Answer:
Gravitational potential energy is one type of potential energy and is equal to the product of the object's mass (m), the acceleration caused by gravity (g), and the object's height (h) as distance from the surface of the ground (the body). In this example, a 3 kilogram mass, at a height of 5 meters, while acted on by Earth's gravity would have 147.15 Joules of potential energy, PE = 3kg * 9.81 m/s 2 * 5m = 147.15 J. The energy added to the system by the crane's swing is the gravitational potential energy gained by the change in the wrecking ball's height. We'll need to use trigonometry to determine the height based on the cable length and angle, calculate the potential energy gained, and convert it to kinetic energy.