**Momentum**-the product of the mass and velocity of an object

**Impulse**-the product of the force and the time over which the force acts on an object

**Conservation of Momentum**-the total momentum of all objects interacting with one another remains constant

**Elastic collision**-when two objects collide and return to their original shapes with no loss of total kinetic energy

**Inelastic collision**-when two objects collide and move together as one mass

**Work**-the product of a force and the displacement of an object

**Kinetic Energy**-energy of motion

**Potential Energy**-stored energy or energy of position

**Mechanical Energy**-the sum of the potential and kinetic energy

**Conservation of Energy**-energy cannot be created or destroyed, but can change its form

**Machine**-a device that transforms the direction or magnitude of a force

**Mechanical Advantage**-how much a machine multiplies your work

**Efficiency**-the ratio of useful work output to work input

**Power**-the rate of work done in a given amount of time

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