Simple Machines and Force

What is a machine?

• A machine is something that has moving parts.

• A machine is a thing that makes work easier.

• A machine is something that makes other things move.

There are _______ types of simple machines.

An example of this type of simple machine is a ramp.

• a wedge

• a pulley

• an inclined plane

• a lever

This simple machine is made of a rope and one or more wheels, and an example is a well.

• a wheel and axle

• a screw

• a wedge

• a pulley

A screw can

• tighten or join two objects together.

• lower an object more easily.

• make it faster and easier to transport objects.

How many types of levers are there?

• 4

• 2

• 3

• 1

A level is made up of a bar which moves on a fixed point, called

• the effort

• the fulcrum

• the load

A force is a _____ or _____ which acts on an object.

Types of contact forces are:

• gravity

• friction

• buoyancy

• magnetism

Gravity

• is a force between objects rubbing or moving at different speeds.

• attracts all objects to the centre of the Earth.

• is a force which acts on an object inside a liquid.