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Transcript

U5 FORCES

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1- TYPES OF FORCES

2 - MAGNETISM

3 - GRAVITY AND WEIGHT

4 - UPTHRUST

1- TYPES OF FORCES

Forces make things move or stay still by pushing or pulling

PUSH

moves something away

PULL

moves something closer

CONTACT FORCES

An object moves another by touching it.

BALANCE FORCES

UNBALANCE FORCES

Two opposite forces are not equal.

He moves by contact

Two opposite forces are equal.

NON-CONTACT FORCES

The force moves an object without touching it.

GRAVITY FORCE

MAGNETIC FORCE

2 - MAGNETISM

Magnetism is a non-contact force and can be push or pull force. Magnetism forces attract iron and steel

Magnets have two ends called the north pole (N) and the south pole (S)

3 - GRAVITY AND WEIGHT

Mass is the amount of matter in an object (Kg) Weight is a force. It is mass X gravity

GRAVITY= 10

GRAVITY is a non-contact pull force. All masses have gravity. The Earth’s gravity pulls everything on the Earth towards its centre.

GRAVITY= 1,6

4 - UPTHRUST

UPTHRUST: is a contact, push force applied by water or air. It’s a opposite force to gravity.

weight

upthrust

weight

upthrust

upthrust

weight

float:

sink:

END