| A | B |
|---|
| Force | A push or a pull; anything that starts, stops, or changes motion. |
| Work | The product of a force exerted on an object. The distance of an object moves in the direction of that force. |
| Mechanical Advantage | The amount that a machine can increase a force and reduce effort. |
| Lever | A rigid bar that is free to pivot. |
| Pulley | A grooved wheel that turns using a rope in the groove. |
| Inclined Plane | A slanted surface with one end higher than the other. |
| Wheel and Axle | A simple machine that has a center rod attached to a wheel. |
| Wedge | A form of an inclined plane sometimes slanted on 2 surfaces. It must be moved in order to do work. |
| Screw | A form of an inclined plane wrapped around a central bar. |
| Examples of Levers | baseball bat, bottle opener, arms, brooms |
| Examples of Screws | Jack screw, DNA helix |
| Examples of Wedges | Axe, maul, door stop |
| Examples of Pulleys | scaling pulleys, clothlines, blinds |
| Examples of Wheels and Axles | Door knob, car wheels, bike wheels |
| Examples of Inclined Planes | Wheel chair ramps, car garage ramps |
| A force can change the motion of an object by making it: | move faster, slow down, change direction, stop, start an object that is standing still. |
| The three types of forces are: | Gravitational, electromagnetic, and nuclear. |
| The _________ is the support or pivot point of a lever. | fulcrum |
| If the fulcrum stays at one end of the lever arm, but the force is applied between the fulcrum and the load, you have a ____________________. | third class lever |
| Fixed Pulleys | Cannot move about, have one pulley, and there is no mechanical advantage. |
| Moveable Pulleys | Can move about, have 2 or more pulleys, and there IS a Mechanical Advantage. |
