AP Physics 1: Work, Energy and Power Review

The video reviews key concepts for the AP Physics 1 exam, including work, energy, power, and Hooke's law. It explains how work causes a change in energy, the types of mechanical energy (kinetic, elastic potential, and gravitational potential), and the conservation of mechanical energy. The video also covers the calculation of power and introduces Hooke's law, emphasizing the importance of identifying forces and angles in these equations. The lesson concludes with a preview of the next topic on linear momentum and impulse.

What is the angle theta used for in the work equation?

• To determine if the work is positive or negative

• To find the magnitude of the force

• To determine the direction of the force

• To calculate the displacement

Which of the following is true about kinetic energy?

• It is the energy associated with height

• It is the energy stored in a spring

• It is always positive because mass and velocity squared are positive

• It can be negative if velocity is negative

What must be identified before solving a problem involving gravitational potential energy?

• The spring constant

• The horizontal zero line

• The angle of displacement

• The mass of the object

When is mechanical energy conserved?

• When there is no friction

• When energy is converted to heat

• When a force is applied

• When the object is moving at constant speed

How is power defined in terms of work?

• The amount of work done per unit force

• The rate at which work is done

• The work done per unit displacement

• The total work done over time

What does Hooke's law state about the force of a spring?

• It is inversely proportional to the displacement

• It is equal to the spring constant times the displacement

• It is independent of the displacement

• It is proportional to the square of the displacement

What are the units of the spring constant in Hooke's law?

• Watts per meter

• Joules per meter

• Meters per second

• Newtons per meter