User:Gallemaso, Rafaelle/sandbox

" SIMPLE MACHINES "

 * WHAT IS A SIMPLE MACHINE?
 * KIND OF SIMPLE MACHINE?

= 1. WHAT IS A SIMPLE MACHINE? = SIMPLE MACHINE - any of several devices with few or no moving parts that are used to modify motion and the magnitude of a force in order to perform work.


 * to make work easier
 * it helps in many ways
 * it transfer force from one place to another
 * it increase the amount of force you applied to a certain task

SIMPLE MACHINE - it has 6 kinds of machines which are:


 * Lever
 * Pulley
 * Inclined Plane
 * Screw
 * Wedge
 * Wheel and axle

2. KINDS OF SIMPLE MACHINE



 * 1) Lever - A lever is a straight or curved rigid bar that is free to turn about a fixed point.

 The 3 locations of interest of lever: 


 * Fulcrum - the support about which a lever turns
 * Point or effort - where work is done on the lever
 * Load - which is being moved

The 3 classes of Levers :


 * CLASS 1 LEVER - has fulcrum located between effort and load.
 * CLASS 2 LEVER - has the load between effort and fulcrum
 * CLASS 3 LEVER - has the effort between the load and fulcrum

2. Pulley - a grooved wheel that turns around an axle which is help in place by a mounting bracket.

 The 3 kinds of Pulleys: 


 * Fixed Pulley - A pulley system in which the pulley is attached to a fixed point and the rope is attached to the object.
 * Movable Pulley - A pulley system in which the pulley is attached to the object; one end of the rope is attached to a fixed point and the other end of the rope is free.
 * Compound Pulley - has a rope or wire attached to a stationary point looped around one wheel and then around a second wheel.

3. The inclined plane - is a plane tilted at an angle, which one end higher than the other. It makes move things to a higher place a lot easier.

4. Screw - '''A spiral inclined plane. It is composed of a cylindrical body with a spiral ridge called thread.'''

5. Wedge - '''It is an inclined plane or two inclined planes that meet each other to form a sharp edge. Wedges are usually good for cutting and piercing.'''

6. Wheel and axle - a machine that has a small disk or shaft called an axle that is attached to a wheel.