7b: Potential & Kinetic Energy

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object has due to its motion. The faster an object moves, the more kinetic energy it has.

Front

What is potential energy?

Back

Potential energy is the stored energy in an object due to its position or state. For example, a car parked on a hill has potential energy.

Front

What is the relationship between speed and kinetic energy?

Back

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

Front

What is gravity?

Back

Gravity is a force that pulls objects toward each other. It gives weight to physical objects and is responsible for keeping us on the ground.

Front

What happens to kinetic energy as an object slows down?

Back

As an object slows down, its kinetic energy decreases.

Front

What is an example of an object with potential energy?

Back

A book on a shelf has potential energy because of its height above the ground.

Front

How does height affect potential energy?

Back

The higher an object is, the more potential energy it has due to gravity.

Front

What is the formula for kinetic energy?

Back

The formula for kinetic energy (KE) is KE = 1/2 mv², where m is mass and v is velocity.

Front

What is the formula for potential energy?

Back

The formula for potential energy (PE) is PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Front

When is kinetic energy at its maximum on a roller coaster?

Back

Kinetic energy is at its maximum at the bottom of each hill on a roller coaster.