Simple Machine

 Simple? Machine? Simple Machine?


Simple Machines

Compound Machines

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Billy Cart



There are six kind of simple machines. Do you want to know about it?

Simple Machines:

  • Inclined Plane
  • Wheel and Axle
  • Pulley
  • Wedge
  • Screw
  • Lever

Inclined Plane

A plane is a flat surface. For example, a smooth board is a plane. Now, if the plane is lying flat on the ground, it isn't likely to help you do work. However, when that plane is inclined, or slanted, it can help you move objects across distances. And, that's work! A common inclined plane is a ramp. Lifting a heavy box onto a loading dock is much easier if you slide the box up a ramp a simple machine.

Wheel and Axle 

It consists of a wheel that turns an axle, or an axle that turns a wheel. It is also a lever that turns in circles around a point or fulcrum. The load on the axle is more easily moved because of mechanical advantage. The wheel and axle can be considered to be a lever in which the radius of the wheel is the effort arm and the radius of the axle represents the resistance arm. It also is a single forced machine. By changing the short distance of lifting, the force is less because the work always stays the same.

A pulley (Also called a seave or block)
is a wheel with a grove between two flanges around its circumference. The groove normally locates a rope, cable or belt. Pulleys are used to change the direction of an applied force, transmit rotational motion, or realize a  mechanical advantage in either a linear or  rotationa system of motion

Instead of using the smooth side of the inclined plane, you can also use the pointed wedges to do other kinds of work. For example, you can use the edge to push things apart.
A screw is a shaft with a helical groove or thread formed on its surface and provision at one end to turn the screw. Its main uses are as a threaded fastener used to hold objects together, and as a simple machine used to translate torque into linear force. It can also be defined as an inclined plane wrapped around a shaft.
In physics, a lever (from French lever, "to raise", c.f. a levant) is a rigid object that is used with an appropriate fulcrum or pivot point to multiply the mechanical force that can be applied to another object. This is also termed mechanical advantage, and is one example of the principle of moments. A lever is one of the six simple machines