# Kinetic energy and potential energy formula

## Kinetic Energy

Practice Problem: Kinetic and Potential Energy of a Ball on a Ramp

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In physics, potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors. Common types of potential energy include the gravitational potential energy of an object that depends on its mass and its distance from the center of mass of another object, the elastic potential energy of an extended spring, and the electric potential energy of an electric charge in an electric field. The term potential energy was introduced by the 19th-century Scottish engineer and physicist William Rankine , [3] [4] although it has links to Greek philosopher Aristotle 's concept of potentiality. Potential energy is associated with forces that act on a body in a way that the total work done by these forces on the body depends only on the initial and final positions of the body in space. These forces, that are called conservative forces , can be represented at every point in space by vectors expressed as gradients of a certain scalar function called potential.

In physics , the kinetic energy of an object is the energy that it possesses due to its motion.
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Chemists divide energy into two classes. Kinetic energy is energy possessed by an object in motion. The earth revolving around the sun, you walking down the street, and molecules moving in space all have kinetic energy. Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K. If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

An object can store energy as the result of its position. For example, the heavy ball of a demolition machine is storing energy when it is held at an elevated position. This stored energy of position is referred to as potential energy. Similarly, a drawn bow is able to store energy as the result of its position. When assuming its usual position i.

## Potential Energy

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