Kinetic energy problems

Front

What is kinetic energy?

Back

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

Front

How do you calculate kinetic energy?

Back

Kinetic energy (KE) is calculated using the formula: KE = 1/2 mv², where m is the mass of the object and v is its velocity.

Front

What happens to kinetic energy if the speed of an object doubles?

Back

If the speed of an object doubles, its kinetic energy increases by a factor of four, since KE is proportional to the square of the velocity.

Front

What is the unit of kinetic energy?

Back

The unit of kinetic energy is the Joule (J).

Front

If a 2 kg object is moving at 5 m/s, what is its kinetic energy?

Back

KE = 1/2 * 2 kg * (5 m/s)² = 25 J.

Front

What is the relationship between mass and kinetic energy?

Back

Kinetic energy is directly proportional to the mass of the object; as mass increases, kinetic energy increases if velocity remains constant.

Front

What is the relationship between velocity and kinetic energy?

Back

Kinetic energy is proportional to the square of the velocity; as velocity increases, kinetic energy increases exponentially.

Front

A 0.5 kg ball is thrown at a speed of 12 m/s. Calculate its kinetic energy.

Back

KE = 1/2 * 0.5 kg * (12 m/s)² = 36 J.

Front

What is the kinetic energy of a 3 kg rabbit moving at 0.5 m/s?

Back

KE = 1/2 * 3 kg * (0.5 m/s)² = 0.375 J.

Front

If an object has a mass of 6 kg and moves at 3 m/s, what is its kinetic energy?

Back

KE = 1/2 * 6 kg * (3 m/s)² = 27 J.