| A | B |
|---|
| Lever | Rigid bar that pivots around a rigid point or fulcrum |
| Fulcrum | Pivot point about which a lever turns |
| First | Class lever with fulcrum between the input and output forces |
| Second | Class lever the output force is between the input force and the fulcrum |
| Third | Class lever the input force between the output force and the fulcrum |
| Inclined Plane | Plane surface that makes an angle to the horizontal surface |
| Wedge | Simple machine consisting of a movable inclined plane used to separate two objects |
| Screw | Inclined plane wrapped around a cylinder |
| Pulley | Simple machine consisting of a rope |
| Mechanical Advantage | Ratio by which the input force is multiplied to achieve a greater output. |
| Three | Levers are divided into how many classes? |
| Spur Gear | A toothed wheel |
| Gear train | System of gears that employs more than one pair of interconnecting gears |
| Worm Gear | Device that combines a screw with a gear.(2) |
| Belt | Part of a mechanical drive system that transfers power from one pulley to another |
| Speed Ratio | Comparison of input pulley speed to output pulley speed (2) |
| Ideal Mechanical | Mechanical advantage in a perfect system without friction. |
| Change Direction | Advantage of a one pulley system (no mechanical advantage!)(2) |
| Double | Pulley system which uses half the pulling force but needs twice the length of chain or rope to move the load. |
| Three | Pulley system which uses 1/3 the pulling force but needs three times the length of chain or rope to move the load. |
| Actual Mechanical | Mechanical advantage that is Output force divided by input force. |
| Single | Pulley system that changes the direction of force but not the force needed or the distance the object moves. |
