Page 2 - SIMPLE MACHINES

 Machines require human energy in order to work. A machine makes our work easier

implies that we need less force to do the same amount of work. They save our time,
effort and labour.
 Machines can be simple or complex. Simple machines are basics and have few parts
while complex machines use combination of two or more simple machines.

DIFFERENT TYPES OF SIMPLE MACHINES:

1. LEVER –

 When a long plank or pole is used to lift a heavy or large load, it is called a lever.
 A lever is a simple machine consists of a long rigid bar, which is free to turn about a fixed
point called a fulcrum.
 The object to be lifted or moved is known as the load, while the force applied on the
lever to lift the object is known as the effort.
 Example of a lever – A seesaw