Friction

Which of the following has a streamline body?

• Dog

• Jeep

• Truck

• Eagle

Friction is a _______ force.

Sliding friction is smaller than:

• rolling friction

• static friction

• fluid friction

• none of the above

Friction always ________ the motion.

Friction depends upon:

• smoothness of surface

• roughness of surface

• inclination of surface

• all of the above

Which of the following is not a lubricant?

• Oil

• Graphite

• Water

• Grease

The frictional force of an object in a fluid depends upon its ____________ with respect to the fluid.

• mass

• speed

• volume

• weight

A submarine in water will experience __________ friction.

• rolling

• viscous

• air

• static

Fluid friction is also called ________.

A jar of Mixer grinder becomes hot when run for a few minutes due to __________.