click below
click below
Normal Size Small Size show me how
Unit 2, Less 1,2,3
vocab
Term | Definition |
---|---|
work | the use of force to move an object some distance in the direction of force |
energy | ability to do work |
power | rate at which work is done |
kinetic energy | energy of motion |
potential energy | energy an object has because of its position, condition, or chemical composition |
mechanical energy | energy possessed by an object due to its motion and position |
machine | any device that helps people do work by changing the way work is done |
mechanical advantage | number of times a machine multiplies the input force |
mechanical efficiency | a comparison of a machine's work output with its work input |
lever | a simple machine that has a bar that pivots at a fixed point |
fulcrum | a fixed point |
wheel and axle | a simple machine that is made of a wheel connected to a small cylindrical object, the axle |
pulley | simple machine that has a grooved wheel that holds a rope or a cable |
inclined plane | a simple machine that is a straight, slanted surface |