Physics Quicksheets - Work, Energy, & Momentum

Kinetic Energy: the energy associated with moving objects. It is given by:

Mechanical energy is conserved when the sum of kinetic and potential energies remains constant.

Relates the work performed by all forces acting on a body in a particular time interval to the change in kinetic energy at that time: 

The expression is

When there are no nonconservative forces (e.g. friction) acting on a system, the total mechanical energy remains constant:

A vector quantity. It is given by:

p = mv

Conservation of Momentum:




Conservation of Kinetic Energy:

Conservation of Momentum:

• Kinetic Energy:

Before:    After: