A Proton in a Certain Particle Accelerator Has a Kinetic

Multiple Choice

A proton in a certain particle accelerator has a kinetic energy that is equal to its rest energy. What is the momentum of the proton as measured by a physicist working with the accelerator? (c = 3.00 × 10⁸ m/s, mproton = 1.67 × 10^-27 kg)

A) 2.51 × 10^-19 kg ∙ m/s
B) 2.89 × 10^-19 kg ∙ m/s
C) 4.34 × 10^-19 kg ∙ m/s
D) 5.01 × 10^-19 kg ∙ m/s
E) 8.68 × 10^-19 kg ∙ m/s