Question

Select the best graph which describe the relation between kinetic energy of an elementary particle and its speed, K represents kinetic energy, v represents particle speed and c speed of light.

• A. (A)
• B. (B)
• C. (C)
• D. (D)
• E. (E)

Answer 1

The correct option is B (B)

According to the special theory of relativity, the maximum speed attainable by a particle in any frame of reference is the speed of light c, and the kinetic energy varies as $\frac{1}{2}m{v}^2$ when speed of particle is very small compared to the speed of light. Thus the correct answer is option B.