The upper limit to the speed of an object with mass
A)depends on the mass.
B)corresponds to a KE equal to its rest energy.
C)is the speed of sound.
D)is the speed of light.

Question

Quizplus · Accepted Answer

According to Einstein's theory of relativity, the upper limit to the speed of an object with mass is the speed of light (299,792,458 meters per second) in a vacuum. As an object approaches this speed, its mass increases and its length contracts, making it impossible for it to reach or exceed the speed of light. Therefore, option D is the correct answer. Option A is incorrect because the mass of an object does not limit its speed to the speed of light. Option B is also incorrect because an object's kinetic energy can never be equal to its rest energy, as this would imply its mass is zero. Option C is incorrect because the speed of sound refers to the speed of a wave in a medium such as air or water, which is much lower than the speed of light.

The Upper Limit to the Speed of an Object with Mass