Practice: Kinetic & Potential Energy

Front

What is Kinetic Energy?

Back

Kinetic Energy (KE) is the energy an object possesses due to its motion, calculated using the formula KE = ½ mv², where m is mass and v is velocity.

Front

What is Potential Energy?

Back

Potential Energy (PE) is the energy stored in an object due to its position or configuration, commonly calculated using the formula PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Front

What is the formula for calculating Kinetic Energy?

Back

KE = ½ mv², where m is mass and v is velocity.

Front

What is the formula for calculating Gravitational Potential Energy?

Back

GPE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Front

If a 2 kg ball is traveling at 6 m/s, what is its Kinetic Energy?

Back

KE = ½ x 2 kg x (6 m/s)² = 36 J.

Front

What is the Kinetic Energy of an object with a mass of 4 kg moving at 3 m/s?

Back

KE = ½ x 4 kg x (3 m/s)² = 18 J.

Front

How do you find the height of an object if you know its Potential Energy and mass?

Back

Rearrange the formula PE = mgh to find height: h = PE / (mg).

Front

What is the Potential Energy of a 2 kg ball at a height of 5 m?

Back

PE = 2 kg x 10 m/s² x 5 m = 100 J.

Front

How much Gravitational Potential Energy does a 5 kg rock have at a height of 10 m?

Back

GPE = 5 kg x 10 m/s² x 10 m = 500 J.

Front

What happens to Kinetic Energy as an object slows down?

Back

As an object slows down, its Kinetic Energy decreases because KE is directly proportional to the square of its velocity.