AP Physics C: Work, Energy, and Power Review (Mechanics)

The video reviews key concepts of work, energy, and power in AP Physics C. It explains the equations for work done by constant and non-constant forces, introduces Hooke's Law, and discusses kinetic and potential energy. The video also covers energy conservation in different systems, the calculation of power, and the role of conservative forces in equilibrium.

What is the equation for work done by a constant force?

• Force times displacement

• Dot product of force and displacement

• Force divided by displacement

• Cross product of force and displacement

Which of the following is true about the work done by a spring?

• It is constant regardless of position

• It is calculated using the dot product

• It requires an integral due to varying force

• It is always zero

What is the formula for kinetic energy?

• 1/2 spring constant times displacement squared

• Force times displacement

• Mass times acceleration

• 1/2 mass times velocity squared

In a non-isolated system, what does the change in energy equal?

• The sum of energy transferred into or out of the system

• Zero

• The final energy of the system

• The initial energy of the system

What happens to a system's mechanical energy if it is isolated and no work is done by friction?

• It becomes zero

• It decreases

• It increases

• It remains constant

What is the SI unit for power?

• Joule

• Newton

• Horsepower

• Watt

How is instantaneous power calculated?

• Energy divided by time

• Derivative of work with respect to time

• Force times velocity

• Work divided by time

What is a conservative force?

• A force that does no work

• A force that is always constant

• A force that equals the negative derivative of potential energy

• A force that depends on the path taken

Which type of equilibrium is characterized by constant gravitational potential energy?

• Dynamic equilibrium

• Neutral equilibrium

• Unstable equilibrium

• Stable equilibrium

What is the relationship between force and potential energy for a spring?

• Force is the negative derivative of potential energy

• Force is the derivative of potential energy

• Force is the integral of potential energy

• Force is the sum of potential energy