Question

State whether the statement is true or false:
Oil is used to reduce the friction on door hinges.

Answer 1

Hint:In this question, we are going to apply the concept of friction which plays a very important role in our daily life. Lubrication is one way to make a surface smoother i.e. to reduce friction and oil acts as a lubricant.

Complete step by step answer:
Friction between two surfaces can be reduced in many ways. Lubrication is one way to make a surface smoother. A lubricant is a slippery chemical substance which is especially designed to reduce the friction between any two surfaces. Since, the hinges on the door are exposed to the atmosphere therefore, their chances of corrosion increase and the surface becomes irregular enough to promote friction. By applying oil on the door hinges we can reduce the amount of friction between them.
So, the statement is true.

Note: There are various methods for decreasing friction as given below:
-By making the surfaces smoother: Rough surfaces produce more friction and smooth surfaces reduce friction.
-By lubrication: A lubricant is a slippery substance especially designed to reduce the friction between any two surfaces.
-By making the object more streamlined: A streamline shape is one that allows air or water to flow around it easily, offering the least resistance/drag.
-By reducing the contact between the two surfaces: Because a very little of a spherical object is in contact with the other surface, therefore spheres are the best suitable shape for reducing friction.