PS 3.2 - Kinetic Energy Practice

Front

What is kinetic energy?

Back

Kinetic energy is the energy that an object possesses due to its motion.

Front

What is the formula for calculating kinetic energy?

Back

The formula for kinetic energy (KE) is KE = ½(mass) x (velocity)².

Front

What is the unit of kinetic energy?

Back

The unit of kinetic energy is Joules (J).

Front

If an object has a mass of 2 kg and is moving at a velocity of 3 m/s, what is its kinetic energy?

Back

KE = ½(2 kg) x (3 m/s)² = 9 J.

Front

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

Back

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

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.

Front

What type of energy is associated with an object at rest?

Back

An object at rest possesses potential energy, not kinetic energy.

Front

What is the kinetic energy of a 1500 gram object moving at a velocity of 100 m/s?

Back

7,500 J.

Front

What is the unit for mass in the kinetic energy formula?

Back

The unit for mass is kilograms (kg).

Front

What is the unit for velocity in the kinetic energy formula?

Back

The unit for velocity is meters per second (m/s).