Vocabulary – Work, Momentum, Power

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