|An unbalanced force or torque causes acceleration. Force accelerates things in a line, and torque is responsible for rotations. By unbalanced we mean that the vector sum of all the forces (or torques) acting on a body is not zero. In plain English, if there is more force pushing to the right than to the left, the object is going to move to the right. The vector sum of all the forces acting on a body is called the net force.So where do forces come from? Physicists have identified four unique fundamental forces. All forces ultimately come from one of these four.
The 4 Forces of nature
We do not ordinarily encounter nuclear forces in our everyday lives, but the
In practice, though, it is not possible to break all forces down into their fundamental sources on the atomic level. Instead, we proceed as if forces come from springs, motors, muscles, or friction.