FORCES AND MACHINES: Unit 6 Natural

Forces can make an object

• start moving

• stop moving

• change shape

• break

The objects that do not go back to their original shape, we say that they change shape...

They go back to their original shape when we remove the force acting on them

• permanently

• temporarily

• break

The ... objects do not change their shape. They break

• flexible

• rigid

It pulls everything towards the Earth

It attracts some objects without contact

It occurs when two objects rub against each other

They are made from two or more materials with different properties

A pulley, an inclined plane and a lever are examples of

• Simple machines

• Complex machines

• Composite materials

If we put the north pole and the south pole of two magnets...

• They attract each other

• They repel each other