Without inclined planes, it would be much more difficult to overcome large resistances or move heavy objects using only a small amount of force. Inclined planes, such as ramps and wedges, allow us to apply a small force over a longer distance to lift or push objects. Other simple machines like screws, levers, pulleys, and wheels and axles also make work easier by either multiplying the force applied or changing the direction of force. All simple machines provide mechanical advantage to help humans perform tasks more easily.

1. What would the world be like without inclined planes?

2. Simple Machines

3. Simple MachinesA tool used to make work easier. Simple tools used to make work easier.

4. Inclined PlaneA slanted (angled) planePermits us to overcome a large resistance by applying a relatively small force to the object.

5. WedgeA type of inclined plane where we use the pointed edges to do other kinds of work. We use it to push things apart

6. ScrewAn inclined plane wrapped around a cylinder. It is another kind of inclined plane. Provides very large mechanical advantage in minimum space

7. LeverAny tool that pries something loose is a lever. Has an arm that pivots against a fulcrum 3 classes of levers

8. First Class Lever The fulcrum is located at some point between the effort and resistance arms.Always changes the direction of the forceEx: Scissors, pliers, see saws

9. 2nd Class LeverThe resistance is located between the fulcrum and the effort forceDoes not change the direction of the forceEx: wheel barrowBottle openers

10. 3rd Class LeverThe effort or force is applied between the fulcrum and the resistance forceDoes not change the direction of the force but produces a gain in speed and distance and decrease in force

11. PulleyA cord wraps around a wheel. As the wheel rotates, the cord moves in either direction. Use the wheel’s rotation to lower and raise objects.

12. Wheel and AxleMoves objects across distances. The wheel, turns the axle, causing movement.Allows for easy movement of objects.

13. Mechanical Advantage