The concept of both force and motion together had been around for thousands of years. In his time, Aristotle believed that a force was required to keep an object moving along a horizontal plane. He also stated that the greater the force exerted on the object, the greater its speed. About 2000 years later, a man named Galileo stated that no force is required to move an object if there is no friction. This lead to the theorized idea that an object would move with a constant speed as long as the net force is zero. Although Aristotle's and Galileo's ideas clashed, both would become the foundation of a new theory of motion.

By using ideas from both Aristotle and Galileo, Sir Isaac Newton would built his famous "3 Laws of Motion". The three laws are as followed :
  1. Every body continues in its state of rest or of uniform speed in a straight line unless it is compelled to change that state by a net force acting on it.
  2. The acceleration of an object is directly proportional to the net force acting on it and is inversely proportional to its mass. The direction of the acceleration is in the direction of the applied force.                               OR
    a = F / m

  3. Whenever one object exerts a force on a second object, the second exerts an equal and opposite force on the first.