To roll forward,there should be a friction between the wheels of a vehicle and

Which word is used to describe push or pull?

When you walk or run, you push the ground

Solids always exert pressure

The unit of pressure is

A liquid gives force of 100 N over an area of 2 m². What is the pressure?

If you are on a swing and your friend pulls it in the direction opposite to its motion, the swing will

Materials used to reduce friction are called

What is the SI unit of force?

The force that opposes the motion or tendency of motion between two surface in contact is called