FORCES KS3

FORCE FACTS!• A force can be a push or a pull. Whenever we are pushing or

pulling, bending or lifting, squeezing or stretching, we are applying a force!

• Forces cannot be seen but you can often see what it can does.

• Forces can:– change the speed of an object– change the direction an object is moving in– change the size or shape of an object

• Forces can be measured using a force meter. • Forces are measured in units called newton, and it has the

symbol N.

GRAVITY• All objects have a force that attracts them

towards each other. This is called gravity. • Gravity only becomes noticeable when

there is a really massive object like a moon, planet or star.

• We are pulled down towards the ground because of gravity.

• The gravitational force pulls in the direction towards the centre of the Earth.

• Gravitational force increases when: – the masses are bigger – the objects are closer

WEIGHT• Weight is a force caused by

gravity. The weight of an object is the gravitational force between the object and the Earth. The more mass the object has the greater its weight will be.

• Weight is a force, so it's measured in newtons.

PRESSURE• You can push a drawing pin into a piece of

wood because you have applied pressure onto the drawing pin.

• To work out pressure, you need to know two things:

• the force or weight applied • the area over which the force or weight works. • This is the equation for working out pressure: • pressure = force ÷ area • Pressure is measured in units called Pascals

(Pa).

MULTICHOICE QUIZZZ

The unit of force is called the?

Question 1

a) Newton

b) Tonne

c) Kilogramme

d) Metre

INCORRECTTRY AGAIN

CORRECTGO TO THE NEXT QUESTION

Gravitational force increases when:

Question 2

a) the mass of the object is smaller

b) the mass of the object is bigger

c) the mass of the object is the same

d) there is no mass

INCORRECTTRY AGAIN

CORRECTGO TO THE NEXT QUESTION

Weight is the force caused by:

Question 3

a) the Earth

b) eating

c) gravity

d) newton

INCORRECTTRY AGAIN

CORRECTGO TO THE NEXT QUESTION

The equation for working out pressure is:

Question 4

d) Pressure = force ÷ area

a) Pressure = mass ÷ speed

b) Pressure = weight ÷ mass

c) Pressure = area ÷ force

INCORRECTTRY AGAIN

CORRECTGO TO THE NEXT QUESTION

END OF TEST

WELL DONE!!!!!