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Unit Lesson 1-3
Term | Definition |
---|---|
work | Is the use of force to move an object some distance in the direction of the force. |
Energy | Is the ability to do work |
Power | Is the rate at which work is done |
Kinetic Energy | Is the energy of motion |
Potential Energy | is the energy of an object has because of its position, or chemical compotion |
Mechanical Energy | is the energy possessed by an object due to its motion and position. |
machine | is any device that helps people do work by changing the way work is done |
mechanical advantage | is the number of times the machine multiples the input force |
Mechanical efficiency | is a comparison of a machines work output with the work input |
lever | is a simple machine that has a bar that pivots at a fixed point |
fulcrum | the fixed point |
wheel and axle | is a simple machine that is made of a wheel connected to a smaller cylindrical object |
pulley | a simple machine that has a grooved wheel thats holds a rope or a cable |
inclined plane | is a simple machine that is a straight, slanded surface |