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Unit 2 Energy
Science
Term | Definition |
---|---|
work | the use of force to move an object some distance it the direction of the force. |
Energy | the ability to work |
power | the rate at witch work is done |
kinetic energy | the energy of a motion |
potential energy | the energy an object has because of its position, condition, or chemical composition |
mechanical energy | the energy an object has due to its motion, or position |
machine | a device that helps people do work by changing the way its done |
mechanical advantage | the number of times a machine multiplies the the force |
mechanicaleffiency | the comparison of a machines work |
lever | a machine that has a bar that pivots at a fixed point |
fulcrum | the fixed point |
wheel and axle | an axle attached to a wheel |
pulley | grooved wheel with a cable |
inclined plane |