일반물리학 2 — Magnetic Fields: Problem 51

51 A proton traveling at 42.0° with respect to the direction of a magnetic field of strength 2.60 mT experiences a magnetic force of \(1.17 \times 10^{-17} \text{ N}\). Calculate (a) the proton's speed, (b) its kinetic energy in electron-volts, and (c) its momentum.