Question 1
Three spaceships A, B, and C are in motion as shown in the figure. The commander on ship B observes ship C approaching with a relative velocity of 0.82
c. The commander also observes ship A, advancing in the rear, with a relative velocity of 0.50
c. What is the speed of ship C as measured by the captain of ship A?

◦ 1.3
c◦ 0.23
c◦ 2.2
c◦ 0.54
c◦ 0.94
cQuestion 2
Calculate the amount of energy needed to accelerate an electron from

to

Express your answer in

The rest mass energy of an electron is 0.511 MeV.
◦ 2.71 MeV
◦ 5.69 MeV
◦ 1.90 MeV
◦ 4.61 MeV