Friction class 8

Which is a type of Friction

• Gravity Friction

• Electrostatic Friction

• Sliding Friction

• All of the above

Which of the following is an example of friction?

• Brakes used on a bike
• Tires from a car on the road
• Tread on the bottom of your shoes
• All of the above

The amount of friction depends on the weight of the object.

• True
• False

How is Friction caused

• Friction is caused by the irregularities on the two surfaces in contact

• By wearing down of objects

• It is caused when gravity is present

• None

Which Friction is smaller

• Rolling friction

• Sliding Friction

In science, fluid is referred to as

• objects that exert pressure

• liquids

• liquids and gasses

• None

Friction that is exerted by fluids is known as Drag

• True

• False

Why are aeroplanes shaped like birds

• So that they can land with balance

• So that they can resist Drag

• So that to Take off without slipping

• None

Objects that decrease Friction are called

• Drag

• Fluids

• Lubricants

• Oil

There is no difference with friction and without friction

• True

• False