Author Question: At what speed must an object be moving in order that it has a kinetic energy 2.50 times its rest ... (Read 70 times)

kodithompson · **on:** Jul 28, 2018

At what speed must an object be moving in order that it has a kinetic energy 2.50 times its rest energy? (c = 3.00 108 m/s)
a. 2.52 108 m/s
c. 2.75 108 m/s
b. 1.91 108 m/s
d. 2.87 108 m/s

Question 2

If the total energy of an electron in an accelerator is five times its rest energy, what is its speed? (c = 3.00 108 m/s)
a. 1.98 108 m/s
c. 2.32 108 m/s
b. 2.94 108 m/s
d. 2.90 108 m/s