If we apply oil on door hinges, the friction will


The friction will decrease on applying oil on door hinges because:


When oil is applied between the moving part of a door, a thin layer is formed there.


Due to which the moving surfaces do not directly rub against each other.


As a result, friction reduces and the movement of door becomes smooth.


Note: The substances which reduce friction are called lubricants. For example – oil, grease, graphite etc.

5
1