Physics Friction Quiz

How do lubricants reduce friction ?

• They create a barrier between the surfaces.

• They fill in the gaps in the surfaces.

• They remove the irregularities in the surfaces.

• They make the surface slippery.

• I DON'T KNOW AND I DON'T CARE.

Who discovered frictional force?

• Leonardo Da Vinci

• Guillaume Amontons

• Sir Isaac Newton

• Albert Einstein

• I didn't discover it.

In which case friction is a disadvantage?

• Writing

• Running

• In Racing Cars

• Walking in New shoes

• Friction is always a disadvantage.

Frictional force exerted by fluids is called ________.

What are the tyres of a racing car called?

Friction depends on the ______ of the surfaces.

Friction opposes the ______ between the surfaces in contact with each other.

Friction causes ______ in machines.

• wear and tear

• wastage of energy

• generation of heat

• all of the above

Streamlining is done to __________.

• Increase friction

• decrease friction

• make the object look cooler

• none of the above

Mark the correct option.

• sliding friction < rolling friction < static friction

• sliding friction > rolling friction > static friction

• static friction > sliding friction > rolling friction

• None of this makes sense to me.