| Question | Answer |
| What is Work? | is when a force causes and object to move in the direction of the force. |
| What is joule? | Joule is the unit used to express work. |
| What is a watt? | The unit used to express power. |
| What is power? | Power is the rate at which work is done. |
| Define Machine | A machine is a device that helps make work easier by changing the size or direction of a force. |
| Work input | the work you do on a machine. |
| Work output | the work done by the machine |
| lever | a simple machine consisting of a bar that pivots on a fixed point ( fulcrum ). |
| inclined plane | a simple machine that is a straight slated surface. |
| wedge | is a double sided inclined plane that moves |
| pulley | is a simple machine consisting of a grooved wheel that holds a rope or a cable |
| compound machine | made of two or more simple machines |
| mechanical efficiency | is a comparison of a machine's work output with the work input |
| mechanical advantage | tells you how many times the machine multiplies force |
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Science Vocab 147928
