Conservation of Energy

Front

What is the law of conservation of energy?

Back

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion. It depends on the mass and speed of the object.

Front

What is potential energy?

Back

Potential energy is the stored energy in an object due to its position or state. For example, an object at a height has gravitational potential energy.

Front

How does energy transform in a swinging pendulum?

Back

In a swinging pendulum, potential energy is highest at the top of the swing and transforms into kinetic energy at the lowest point.

Front

What happens to the total energy in a closed system?

Back

In a closed system, the total energy remains constant, even as it transforms between kinetic and potential energy.

Front

What is an example of an object with both kinetic and potential energy?

Back

A roller coaster at the top of a hill has potential energy due to its height and kinetic energy as it starts to move down.

Front

What is the relationship between speed and kinetic energy?

Back

Kinetic energy increases with the square of the speed; if speed doubles, kinetic energy increases by four times.

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the potential energy held by an object because of its height above the ground, calculated as mass x gravity x height.

Front

What is mechanical energy?

Back

Mechanical energy is the sum of kinetic and potential energy in an object that is used to do work.

Front

What is an example of energy transformation?

Back

When a light bulb is turned on, electrical energy is transformed into light and thermal energy.