Work, Energy and Power Flashcards

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1
Q

Work

A

The product of the displacement and the component of the force parallel to the displacement.

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2
Q

Gravitational potential Energy

A

The energy an object possesses due to its position relative to a reference point.

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3
Q

kinetic energy

A

The energy an object has as a result of the object’s motion.

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4
Q

Mechanical energy

A

The sum of gravitational potential energy and kinetic energy at a point.

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5
Q

The principle of conservation of mechanical energy

A

In the absence of air resistance or any external forces, the mechanical energy of an object is constant.

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6
Q

The law of Conservation of Energy

A

The total energy in a system cannot be created nor

destroyed; only transformed from one form to another.

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7
Q

The work-Energy Theorem

A

The work done by a net force on an object is equal to the change in the kinetic energy of the object.

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8
Q

Power

A

The rate at which work is done OR The rate at which energy is transferred.

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9
Q

One Watt

A

The power when one joule of work is done in one second.

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10
Q

Efficiency

A

The ratio of output power to input power.

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