Chapter 9: Forces

What is the SI unit of force?

• Newton, N

• Kilogram, Kg

• Grams, g

• Centimetre, cm

Which of these is a contact force?

• magnetic force

• frictional force

• elastic force

• gravitational force

• electrostatic force

State an example of a frictional force in our everyday world.

Give an example of a non-contact force.

​_________ is the amount of matter in an object

• weight

• mass

________ is the gravitational force exerted on an object

• mass

• weight

Samuel can weigh 500N on earth but 380N on another planet

• True

• False

The diagram shows a ripe durian dropping from the tree at a certain height.

Which graph correctly shows the amount of gravitational force acting on the durian when it drops?

• 
• 
• 
• 

What is the formula for pressure?

What is the SI unit of pressure?

• Pa

• N