Description: Force is equal to mass times acceleration. We can use algebra to also calculate acceleration or mass from this formula. 
Key Terms: Mass, force, acceleration, algebra

Newton was the first to discover the relationship among three basic physical concepts—acceleration, force, and mass. He proposed one of the most important rules of nature, his second law of motion. Newton’s second law states:

The acceleration of an object is directly proportional to the net force acting on the object, is in the direction of the net force, and is inversely proportional to the mass of the object.