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Potential Energy An object can store energy as the result of its position. Gravitational Potential Energy Gravitational potential energy is the energy stored in an object as the result of its vertical position or height PE grav = mass g height PE grav = m * g h In the above equation, m represents the mass of the object, h represents the height of the object and g represents the gravitational field strength (9.8 N/kg on Earth) - sometimes referred to as the acceleration of gravity.

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Kinetic Energy The energy of motion. There are many forms of kinetic energy - vibrational (the energy due to vibrational motion), rotational (the energy due to rotational motion), and translational (the energy due to motion from one location to another). Kinetic energy is a scalar quantity. Scalars are quantities that are fully described by a magnitude (or numerical value) alone

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Elastic Potential Energy The energy stored in elastic materials as the result of their stretching or compressing. Springs are a special instance of a device that can store elastic potential energy due to either compression or stretching. A force is required to compress a spring; the more compression there is, the more force that is required to compress it further. For certain springs, the amount of force is directly proportional to the amount of stretch or compression (x); the constant of proportionality is known as the spring constant (k). There is a special equation for springs that relates the amount of elastic potential energy to the amount of stretch (or compression) and the spring constant. The equation is

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Mechanical Energy The energy acquired by the objects upon which work is done. The energy that is possessed by an object due to its motion or due to its position. A hammer is a tool that utilizes mechanical energy to do work.

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Potential and Kinetic Energy…

Potential and Kinetic Energy…

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