1.14 understand that friction is a force that opposes motion

1.14 understand that friction is a force that opposes motion

Friction is the force that causes moving objects to slow down and finally stop. The kinetic energy of the moving object is converted to heat as work is done by the friction force. Friction occurs when solid objects rub against other solid object and also when objects move through fluids (liquids and gases).

Friction reduces efficiency of machines and cause wastage. It also wears and tears the surface.

It can be reduced by making the surface smooth using lubricating oils.

However, friction is the reason we can walk, or write. It is helping us in various ways.