Work-Energy Theorem Quiz

What happens to the work done on a system?

• Energy is transferred out of the system

• Energy is converted into mass

• Energy is transferred into the system

• Energy remains constant in the system

In the context of the lawn mower, how is the energy put into the mower by the person removed from the system?

• It is stored as potential energy

• It is transferred to the Earth

• It is removed continuously by friction

• It is converted into light energy

What is an example of storing energy in a system by doing work on the system?

• Swinging on a swing set

• Carrying a backpack while walking

• Lifting stone blocks during construction of the pyramids

• Pushing a car on a flat road

What is the expression for net work in terms of the net force on an object?

• Wnet = Fnet * d * cos(θ)

• Wnet = Fnet / d * cos(θ)

• Wnet = Fnet + d * cos(θ)

• Wnet = Fnet - d * cos(θ)

What is the effect of the net force on a system when it accelerates the object?

• The kinetic energy increases

• The potential energy increases

• The kinetic energy decreases

• The potential energy decreases

What is the relationship between net work and the speed given to a system by the net force acting on it?

• Wnet = m * v^2 - m * v0^2

• Wnet = 1/2 * m * v^2

• Wnet = m * a * d

• Wnet = m * g * h

What is the expression for the work-energy theorem?

• Wnet = m * g * h

• Wnet = Fnet * d * cos(θ)

• Wnet = 1/2 * m * v^2 - 1/2 * m * v0^2

• Wnet = m * a * d

What does the work-energy theorem imply?

• The net work on a system equals the change in potential energy

• The net work on a system equals the change in kinetic energy

• The net work on a system equals the change in total energy

• The net work on a system equals the change in thermal energy