Both the baseball and cannonball will hit the ground at the same time, assuming they are dropped from the same height and with no air resistance. This is because in the absence of air resistance, the only force acting on the objects is gravity, which accelerates all objects at the same rate regardless of their mass. This is known as the principle of equivalence of gravitational and inertial mass, as described by Galileo. Therefore, both objects will fall at the same rate and hit the ground simultaneously.
