Unit 4: Energy Review

Front

What is Kinetic Energy (KE)?

Back

Kinetic Energy is the energy an object possesses due to its motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

What is Potential Energy (PE)?

Back

Potential Energy is the stored energy of an object due to its position or state, commonly gravitational potential energy, calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

At what point during a fall does Kinetic Energy equal Potential Energy?

Back

Kinetic Energy equals Potential Energy halfway down the fall.

Front

How is work defined in physics?

Back

Work is defined as the energy transferred when a force is applied to an object over a distance, calculated as Work = Force x Distance.

Front

What is the unit of work in the International System of Units (SI)?

Back

The unit of work is the Joule (J).

Front

How much work is done when carrying a 30N rock for 10 meters?

Back

300 Joules of work is done.

Front

What does the Law of Conservation of Energy state?

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 energy transformation?

Back

Energy transformation is the process of changing energy from one form to another, such as from nuclear energy to electrical energy.

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the energy an object possesses due to its height above the ground, calculated as PE = mgh.

Front

If a coffee mug has 40J of gravitational potential energy and a mass of 2kg, what is its height?

Back

The height is 2.04 meters.