Physics Concepts Quiz

What are the necessary conditions for work to be done in physics?

• Displacement and time

• Force and displacement in the direction of the force

• Force and time

• Energy and power

According to Richard Feynman, how is energy best described?

• A variable that depends on momentum

• A force that changes with time

• A number that remains constant regardless of changes

• A measure of displacement

What is the law of conservation of energy?

• Energy remains constant in a closed system

• Energy can be created and destroyed

• Energy is always increasing

• Energy is dependent on force

How is power defined in physics?

• The rate at which work is done

• The force applied over time

• The total energy used

• The displacement caused by a force

What is the commercial unit of energy commonly used?

• Watt

• Joule

• Newton

• Kilowatt-hour