If the velocity of a moving object is doubled, its kinetic energy quadruples. This phenomenon arises from the kinetic energy formula, which is directly proportional to the square of the velocity. Doubling the velocity results in a fourfold increase in kinetic energy, as the energy is proportional to the square of the velocity. Acceleration, on the other hand, remains unaffected by changes in velocity unless there’s an external force acting upon the object. Weight, a measure of gravitational force acting on an object’s mass, is unrelated to changes in velocity alone. Therefore, it doesn’t double when velocity doubles. Thus, the correct answer is [C] Kinetic energy quadruples. This relationship between velocity and kinetic energy is fundamental in understanding the dynamics of moving objects and is applicable across various physical scenarios, regardless of specific object characteristics.