Newton's Laws of Motion

Newton 0th Law
Objects are dumb - They have no memory of the past and cannot predict the future. Objects only know what is acting directly on them right now

Newton's 1st Law
An object that is at rest will remain at rest or an object that is moving will continue to move in a straight line with constant speed, if and only if the sum of the forces acting on that object is zero.

Newton's 2nd Law
acceleration of an object = sum of forces acting on that object / the mass of the object

Newton's 3rd Law
Recall that a force is an interaction between two objects. If object A exerts a force on object B then object B exerts a force on object that is in the opposite direction, equal in magnitute, and of the same type.