FORCES

You use forces  to move, change shape,  break and stop things.

MACHINES

Machines help us work. They help us to do things easily.

There are simple and complex machines

Simple machines: hammers, wheels, pullies, etc...

Complex machines: cars

They   can use to function:

 Human force:  Hammer and bottle opener.

Electricity: torches and batteries

Petrol: cars and motorcycles

COMPUTERS

Computers are machines. We use them for writing, drawing, finding information, listening to music…

parts of a computer:

CPU. This is the brain of the computer. All the other parts of the computer are connected to it.

Monitor. This shows texts and images.

Speakers: reproduce sounds and music.

Printer. We use this to print

Mouse. We use this to move the cursor.

Keyboard. We use this for writing.

Computers can be connected to a telephone line. Then, we can use the Internet.