Dams are constructed with

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

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

When you walk or run, you push the ground

If you are cycling, and wind pushes you from behind, your speed will

Which one of the following is something that can bring about a change in the state of rest or of motion of a body or a change in its shape or size?

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

Which is the device used to measure pressure inside a vessel?

To lift 1 kg you would like to have apply a force of about

Force acting on unit area is called