1. Simple Machines
There are 6 types of simple machines: the inclined plane, the wedge, the screw, the lever, the pulley, and the wheel and axle.

2. Simple Machines A ramp is an example of an inclined plane.
A ramp decreases the amount of force you need to exert, but it increases the distance you must exert force.

3. Simple Machines A wedge is an inclined plane that moves.
A wedge is usually a piece of wood or metal that is thinner on one end than the other.

4. Simple Machine
The screw is an inclined plane wrapped around a central bar, or cylinder, to form a spiral.
The mechanical advantage of a screw increases when the threads are closer together.

5. Simple Machine
A lever is a rigid bar that is free to pivot, or move about, a fixed point.
The fixed point is called a fulcrum.
When a force is applied on a part of bar (lever) by pushing or pulling it, the lever swings about the -
fulcrum and overcomes the resistance force.

6. Simple Machine
A pulley is a rope, belt, or a chain wrapped around a grooved wheel.
A pulley can function in 2 ways:
It can change the direction of a force or the amount of force.

7. Simple Machines
A wheel and axle is a simple machine made up of two circular objects of different sizes.
The wheel always moves through a greater distance than the axle.

8. Simple Machine
The mechanical advantage of a wheel and axle depends on the radius of the wheel and of the axle.
If the radius of the wheel is 4x greater than the radius of the axle, every time you turn the wheel once, -
your force is multiplied by 4.

9. Simple Machine
A compound machine is a combination of two or more simple machines.