If the object is pulled to stretch the spring or pushed to compress the spring, then by Newton’s Third Law the force of the spring on the object is equal and opposite to the force that the object exer...If the object is pulled to stretch the spring or pushed to compress the spring, then by Newton’s Third Law the force of the spring on the object is equal and opposite to the force that the object exerts on the spring. We shall refer to the force of the spring on the object as the spring force and experimentally determine a relationship between that force and the amount of stretch or compress of the spring.
