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Unit, lesson 1,,2,3
| Question | Answer |
|---|---|
| work | the transfer of energy ti an object by using a force that causes the object to move in the direction of the force |
| power | the rate at which work is done or energy is transformed. |
| energy | the ability to do work |
| kinetic energy | is the energy in motion |
| potential energy | is the energy an object has because of its position, condition,or chemical compostions |
| 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 it works and how its done. |
| mechanical advantage | is the member of times the machines multiplies the input force. |
| mechanical effciency | is a comparison of a a machine's work output with the work imput |
| lever | is a simple machine that has a bar that pivots at a fixed point |
| fulcrum | is the fixed point |
| wheel and axle | is simple machine that is made of a wheel connected to a smaller cylindrical, the axle. |
| pulley | is asimple machine that has a grooved wheel that holds a rope or cable. |
| inclined plane | is a simple machine that is a straight, slanted surface. |
Created by:
18cheern0930
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