A spaceship of mass 106 kg is to be accelerated to 0.60c. How much energy does this require?
a. 2.3 1022 J
c. 2.5 1023 J
b. 6.0 1022 J
d. 1.5 1023 J
Question 2
The mass of a proton at rest is m. If the proton is moving so fast that its total energy is four times its rest energy, then what is the kinetic energy of the proton?
a. 3mc2
c. 2mc2
b. mc2
d. 4mc2