Question

what is force...............

Answer 1

Force is a pull or push acting on a surface
Lubricants are the things that reduce the friction as foe and friends both
We use telecom power to reduce the friction between the sriker and the coin

Answer 2

Force is that cause which either changes or tends to change the shape, size, dimensions, state of rest, state of motion etc. of an object over which it acts.The SI unit of force is newton, denoted by N . The forces are mainly divided on the basis of when it acts. The types of forces are given below : -

1. Contact Forces

The forces that are applicable only when the objects under consideration are in actual physical contact with each other are called contact forces. Examples: Frictional Force, Muscular Force, Force of Tension, etc.

2. Non-contact Forces

The forces that are applicable even if the objects under consideration are not in actual physical contact are named non-contact forces. Examples: Gravitational Force, Electrostatic Force, Magnetic Force, etc.