click below
click below
Normal Size Small Size show me how
forces and motion 4
| Term | Definition |
|---|---|
| machine | something that replaces human effort and makes work easier |
| simple machine | A tool that makes work easier; has few or no moving parts |
| energy | the ability to do work |
| work | The ability to move something |
| wheel and axle | a simple machine consisting of a grooved wheel turned by a cord or chain with a firmly attached axle together with supports |
| lever | a simple machine consisting of a solid bar that rotates around a pivot point; used to lift objects |
| pulley | a simple machine made up of a rope wrapped around a wheel. When a downward force is applied on the rope, an upward force is created |
| screw | a simple machine made up of a shaft with grooves that wrap around it going from top to bottom |
| inclined plane | an object with a flat, tilted surface, a simple machine that helps things roll or slide upward off the ground |
| wedge | a simple machine that can be used to split objects apart, hold objects in place, or lift objects from the ground; consists of two inclined planes joined together |