Work-Energy Theorem Quiz

What does the work-energy theorem state about the relationship between work and kinetic energy?

• Kinetic energy is always less than work done.

• Net work done on an object equals its change in kinetic energy.

• Work and kinetic energy are unrelated.

• Work is always greater than kinetic energy.

How can you calculate work if you know the change in kinetic energy?

• Divide the change in kinetic energy by the force.

• Multiply the change in kinetic energy by the distance.

• Subtract the initial kinetic energy from the final kinetic energy.

• Use the change in kinetic energy directly as the work done.

What happens to an object's velocity if the net work done is zero?

• The object speeds up.

• The object slows down.

• The object's velocity remains constant.

• The object changes direction.

If the net work done on an object is positive, what can be inferred about its motion?

• The object is moving in the opposite direction of the net force.

• The object's kinetic energy is increasing.

• The object is slowing down.

• The object's kinetic energy is decreasing.

In the example with Suzie and the apple, what is the initial kinetic energy of the apple?

• 25 Joules

• 110 Joules

• 0 Joules

• 34.3 Joules

How much work does Suzie do on the apple if its change in kinetic energy is 34.3 Joules?

• 0 Joules

• 34.3 Joules

• 68.6 Joules

• 17.15 Joules

In the car example, what is the mass of the car used in the calculation?

• 900 kg

• 500 kg

• 1500 kg

• 110 kg

What is the final velocity of the car in the example problem?

• 15 m/s

• 45 m/s

• 25 m/s

• 35 m/s

How is the net work calculated in the car example?

• By multiplying the mass by the change in velocity.

• By subtracting the initial kinetic energy from the final kinetic energy.

• By dividing the final kinetic energy by the initial kinetic energy.

• By adding the initial and final kinetic energies.

What is the net work done on the car when its velocity changes from 15 m/s to 25 m/s?

• 1.80 * 10^5 Joules

• 1.00 * 10^5 Joules

• 2.00 * 10^5 Joules

• 1.50 * 10^5 Joules