Kinetic Energy Equations

Front

What is Kinetic Energy?

Back

Kinetic Energy is the energy an object possesses due to its motion. It is calculated using the formula KE = 0.5 x mass x velocity².

Front

What is the formula for calculating Kinetic Energy?

Back

KE = 0.5 x m x v², where m is mass and v is velocity.

Front

If a 90 kg man is traveling at 25 km/h, how do you calculate his Kinetic Energy?

Back

Use the formula KE = 0.5 x 90 kg x (25 km/h)².

Front

What happens to Kinetic Energy if the velocity of an object is doubled?

Back

The Kinetic Energy quadruples (increases by a factor of 4) because KE is proportional to the square of the velocity.

Front

Calculate the Kinetic Energy of a 11 kg baby crawling at 2 m/s.

Back

KE = 0.5 x 11 kg x (2 m/s)² = 22 J.

Front

What is the unit of Kinetic Energy?

Back

The unit of Kinetic Energy is Joules (J).

Front

How does mass affect Kinetic Energy?

Back

Kinetic Energy increases with an increase in mass; if mass increases, Kinetic Energy increases.

Front

If an object is at rest, what is its Kinetic Energy?

Back

If an object is at rest, its Kinetic Energy is 0 J because velocity is 0.

Front

What is the Kinetic Energy of a 5 kg object moving at 3 m/s?

Back

KE = 0.5 x 5 kg x (3 m/s)² = 22.5 J.

Front

What is the relationship between Kinetic Energy and speed?

Back

Kinetic Energy increases with the square of the speed; if speed doubles, Kinetic Energy increases by a factor of four.