Page 33 - Science Class 6 Times Publication

Advantages of simple machines

We can perform our task faster and more conveniently by using
simple machines. The simple machines make our work easier in the
following ways:

1. Simple machines multiply the applied force

We can lift a heavy load by using
less effort in a simple machine.
For example, you must have
seen the use of a screw jack to
lift the vehicles while changing
their wheel. Similarly, we can
lift a heavy piece of a rock by
using a crow-bar.
In the above examples, if we
try to lift the vehicles or the
pieces of rocks without suitable
machine, we cannot lift them. But we can easily lift them with the
help of simple machines because the simple machines multiply our
applied force.

2. Simple machines increase the speed of doing work
If you try to transport bricks from one place to another by carrying
them on hands, it will take more time. But you can transport
several bricks at a time by using a wheel-barrow. Thus, the
wheel-barrow makes your work faster. It means that the simple
machines increase the speed of doing work.

Wheel barrow Use of bottle opener Use of door knob

Times' Crucial Science and Environment 29 Book 6