Question

A force is a push or a pull. Newton's third law further defines the meaning of force. Explain.

Answer 1

We define force in physics as the external agencies that alter a state of motion.
The fundamental equation of force is F = m × a
where F is the force, m is the mass of the object on which the force is applied and a is the acceleration generated.
Classifications of forces are.
1.Contact Force
2.Non Contact Force
3.Tensile Force
4.Normal Force

More information about Force at http://goo.gl/iEACPs