In previous chapters, we have so far learned about Newton’s Theory of Classical Mechanics, which allowed us to model the motion of an object based on the forces acting on the object. In this chapter, ...In previous chapters, we have so far learned about Newton’s Theory of Classical Mechanics, which allowed us to model the motion of an object based on the forces acting on the object. In this chapter, we present the theories that describe the force of gravity itself. We will see several theories of gravity and focus primarily on Newton’s Universal Theory of Gravity.