There are three laws of motion
An object that is at rest will remain at rest and an object in motion will remain in motion unless acted upon by an external unbalanced force
Force is directly proportional to mass and acceleration
This gives the formula:
Force = mass * acceleration, where force and acceleration are both vector quantities.
Arguably the most popular one, this law says:
Every action has an equal and opposite reaction.
Well, it turns out, that the partner forces are acting on different objects. If object a is exerting a force of 10N on b, b is exerting a force of 10N on a. Ok. But what's missing here is that the 10 N on b don't cause the same effect as 10N on a. Since according to law 2, acceleration = force / mass, the lesser the mass, more the acceleration, even if force is same.
This drawing contains a table, denoted by T, an object, denoted by A, and the earth, denoted by E. Every force is in the form of , where F is the force, X is the object that the force is being applied on, and Y is the object applying the force
AE (Force exerted on the object by the earth, a.k.a Gravity)
EA (Force exerted on the earth by the object)
AT (Force exerted on the object by the table)
TA (Force exerted on the table by the object)