Final answer:
The bowling balls would both reach the ground at the same time because the time it takes for an object to fall depends only on the height from which it is dropped and not on its mass.
Step-by-step explanation:
The bowling balls would both reach the ground at the same time because the time it takes for an object to fall depends only on the height from which it is dropped and not on its mass. This is known as the principle of equivalence. According to this principle, objects of different masses will fall at the same rate in a vacuum, ignoring any air resistance.
For example, if both bowling balls are dropped from the fifth floor of a building, they will experience the same acceleration due to gravity and will reach the ground at the exact same time. This is because the gravitational force acting on each ball is proportional to its mass, so the mass cancels out of the equation.