Friction (L2)

Rolling friction is _______ than sliding and static friction

• Lesser

• Equal to

• Greater

• None of the above

Sliding friction is _________ than the static friction

• less

• more

• equal

• zero

What kind of substances are known as lubricants?

• Increase friction

• Decrease friction

• Increase or decrease friction

• None of these

Which is a/ are streamlined object?

• Aeroplane

• Boat

• Ship

• All the above

It is difficult to walk on an oily floor because

• Force of friction is very less

• Force of friction is very high

• we don't like to walk on oily floor

• None of these

What force ultimately slows the roller coaster to a stop?

• Applied
• Normal
• Friction
• Magnetic

This photo represents...

• Air resistance

• water resistance

• friction force between 2 solid bodies

Which type of friction is shown in the picture?

• rolling

• static

• fluid

• sliding

Which type of friction is shown in the picture?

• fluid

• static

• rolling

• sliding

Why are the soles of shoes and tyres of vehicles grooved?

• To increase friction

• To reduce friction