Chapter 37.8, Problem 37.8TYU

A proton is accelerated from rest by a constant force that always points in the direction of the particle’s motion. Compared to the amount of kinetic energy that the proton gains during the first meter of its travel, how much kinetic energy does the proton gain during one meter of travel while it is moving at 99% of the speed of light? (i) The same amount; (ii) a greater amount; (iii) a smaller amount.