Energy, Work, and Power

Front

What is the formula for work?

Back

W = F(D) where W is work, F is force, and D is displacement.

Front

How much work is done if a force of 17 Newtons moves an object 4 meters?

Back

68 J (Work = Force x Distance = 17 N x 4 m).

Front

What is required for a force to qualify as having done work?

Back

There must be a displacement, and the force must have caused the displacement.

Front

What is Elastic Potential Energy?

Back

Energy stored in elastic materials, such as a compressed spring or a stretched elastic object.

Front

What is the definition of Power in terms of work?

Back

Power is the rate at which work is done, calculated as Power = W/T.

Front

What is Gravitational Potential Energy?

Back

Energy an object possesses due to its position in a gravitational field, calculated as PE = mgh.

Front

What is Kinetic Energy?

Back

Energy of an object in motion, calculated as KE = 1/2 mv².

Front

What is the unit of work?

Back

The unit of work is the Joule (J).

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in energy of that object.

Front

What is the principle of conservation of energy?

Back

Energy cannot be created or destroyed, only transformed from one form to another.