Friction and inertia

Is inertia a force?

• Yes

• No

What is inertia?

• Force of attraction that exists between two bodies

• Resistance of an object to change in its state of motion

• Force that slows down an object's motion

• The forces that are in opposite motion to an object in the air

How many laws of motion are there?

• 1

• 2

• 3

• 4

Newton's first law of motion is sometimes referred to as 'the law of inertia'

• True

• False

Which of the following is not an example of inertia?

• Your body jerks to one side after a car suddenly breaks

• A sled sliding across snow

• You fall over the handlebars of a bike if you suddenly slam the front brakes

• You turn the handles of a jetski and you fall off while continuing to move in a straight direction

What is friction?

• Force of attraction that exists between two bodies

• Resistance of an object to change in its state of motion

• Force that slows down an object's motion

• The forces that are in opposite motion to an object in the air

What affects friction?

• How rough the surfaces of two objects are

• How fast an object is travelling

• The sudden stopping force of motion

• Kilometres travelled

The grooves on your fingers __________________ the friction between objects you touch and your fingers

• Increase

• Decrease

A hotwheels toy car travelling at a constant speed will travel furthest on

• A muddy surface

• Cemented footpath

• Marble countertop

• Bricks

It's difficult to walk on a wet, slippery floor because....

• There's more friction

• There's more resistance

• You're probably not wearing shoes

• There's less friction