Question

After passing Earth, Samir fires a rocket of mass 400 kg backwards that travels at 1.0c relative to his spaceship. Maria measures the rocket to be moving at:

a)0.70c

b)0.65c

c)0.60c

d)0.55c

e)The rocket cannot travel at 1.0c relative to Samir's spaceship

Please explain your answer

Answer 1

Correct option is e

because according to Einstein theory, a body having some rest mass cannot attain speed of light and if it happens then it's mass would become infinite and its energy also becomes infinite which is not possible. So that's why it cannot attain speed of light equal to 1.0c.