Friction Test -...

Friction is a type of:

Powder is a lubricant

To keep machines running smoothly and to avoid wear and tear of machines, the best and the most commonly used lubricant is:

The frictional force exerted by fluids is called:

The soles of our shoes wears out because:

Which of the following is easier to hold with a greasy palm?

Treading of tyres is done to:

A ship moving in a sea can't be stopped quickly by applying brakes due to:

When a coin and a feather are dropped simultaneously from the same height, the coin strikes the ground first. This is because of:

The force which prevents us from slipping while walking on the road is: