What is force where is it applied give examples of forces?

Answer 1

The fundamental scientific definition of force is the one devised by Isaac newton, which is that force equals mass times acceleration. Force could therefore be described as that which is capable of altering the motion of a mass. Scientists have identified four basic forces, which are the gravitational force, the electromagnetic force, the strong nuclear force and the weak nuclear force. Each of these does many different things, in various complicated ways that influence everything that happens in our universe. All events are driven by forces, since only force can alter the motion of mass. Without forces, only inertia would govern the motion of mass of any kind. The solidity of matter is a result of the electromagnetic force. Since atoms have electrons on the outside, and electrons repel other electrons in accordance with the electromagnetic force (which is mathematically defined by Coulomb's Law) atoms repel other atoms when they get close enough. That is the only reason why two solid objects do not interpenetrate each other or occupy the same space. Gravity, of course, is what holds us to the surface of the planet Earth and which also hold the planet itself together. Without gravity, the entire solar system would never have condensed out of the cloud of interstellar gas from which it originally formed some four and half billion years ago. Those are just a few examples.