Final answer:
A heavier object does not have an infinite normal reaction; instead, the normal reaction is equal to its weight, which depends on its mass and the acceleration due to gravity. Heavy and light objects fall at the same rate in a vacuum, as shown by Galileo's experiments.
Step-by-step explanation:
The statement that a heavier object has an infinite normal reaction is incorrect. A normal reaction is a force that surfaces exert to support the weight of an object. The normal force is equal to the weight of the object only if the object is at rest on a horizontal surface. Weight is the force due to gravity and is calculated as the mass of the object multiplied by the acceleration due to gravity. Therefore, heavier objects will have a greater normal reaction because they have more mass, but this reaction is not infinite—it is directly proportional to the weight of the object.
It is also important to note that contrary to some Renaissance beliefs, heavy objects do not fall faster than light objects. Galileo's experiments proved that in the absence of air resistance, all objects fall at the same rate regardless of their mass. The equation of motion demonstrates that, in a vacuum, the acceleration due to gravity is constant and does not depend on the mass of the object.