A spaceship traveling at a speed of 0.8c relative to an observer throws a ball at 0.2 c in forward direction. What is the energy of the ball as seen by the observer, given that its rest mass energy of the ball is 2.5 MeV? Round off upto 1 decimal point.
1
5.1 MeV
2
5.2 MeV.
3
5.3 MeV.
4
5.4 MeV.
5
Question Not Attempted