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.

What is the force formula?

$F=ma$ where F is force and is measured in Newtons (N), m is the mass of an object in kilograms (㎏), and a is the acceleration of the object expressed in metre per second squared (m/s^{2}).

Example question

Mass of a stationary ball is 11 kg. We want to accelerate it to 2 m/s^{2} speed. How much force is required?