what is force?

Dear student,
Your answer is as follows :

Force is the capacity to do work and cause physical change . Force is a push or pull resultion from mass’s interaction with another object.
Force can be of two types : Contact force and force acting from a distance.

Force = Mass * acceleration

In physics, a force is any interaction which tends to change the motion of an object. In other words, a force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate. Force can also be described by intuitive concepts such as a push or a pull. A force has both magnitude and direction, making it a vector quantity. It is measured in the SI unit of newtons and represented by the symbol F.
The original form of Newton's second law states that the net force acting upon an object is equal to the rate at which its momentum changes with time. If the mass of the object is constant, this law implies that the acceleration of an object is directly proportional to the net force acting on the object, is in the direction of the net force, and is inversely proportional to the mass of the object. As a formula, this is expressed as:

F= ma

where the arrows imply a vector quantity possessing both magnitude and direction.