Kinetic energy problems

Front

What is kinetic energy?

Back

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

Front

What happens to kinetic energy as mass increases?

Back

As mass increases, kinetic energy increases, assuming velocity remains constant.

Front

What is the formula for calculating kinetic energy?

Back

The formula for calculating kinetic energy is KE = 1/2 mv².

Front

What is the standard international unit for energy?

Back

The standard international unit for energy is the joule (J).

Front

Calculate the kinetic energy of a 2.1 kg volleyball moving at 30 m/s.

Back

The kinetic energy is 945 J, calculated using KE = 1/2 mv².

Front

Calculate the kinetic energy of a 3 kg rabbit walking at 0.5 m/s.

Back

The kinetic energy is 0.375 J, calculated using KE = 1/2 mv².

Front

How much kinetic energy does a 6 kg object moving at 3 m/s have?

Back

The kinetic energy is 27 J, calculated using KE = 1/2 mv².

Front

If an object's speed doubles, what happens to its kinetic energy?

Back

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

Front

What is the relationship between velocity and kinetic energy?

Back

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

Front

What is the kinetic energy of an object at rest?

Back

The kinetic energy of an object at rest is 0 J, since its velocity is 0.