Question

Define force. In which units is it measured ?

Answer 1

A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects. When the interaction ceases, the two objects no longer experience the force.
The SI unit of force is Newton(N)
F=ma
The net force equals the mass of the object multiplied by the amount of acceleration.