- #1

duggielanger

- 17

- 0

## Homework Statement

The mass of a proton when at rest is m. According to an observer using the

detector frame, the speed of the anticlockwise moving bunch, A, is such that

va^2/c^2=24/25

Show that the total relativistic energy of a proton in bunch A, as observed in

the detector frame, is exactly 5mc^2, and work out the speed of the proton,

expressed as a decimal multiple of c, (to 5 significant figures).

## Homework Equations

Right I think its these

E=mc^2

Etot=mc^2/√1-v^2/c^2

Etrans=mc^2/1-v^2/c^2

and maybe

E^2tot=p^2c^2+m^2c^4

p=mv/1-v^2/c^2

## The Attempt at a Solution

Now I know that to get Etot you need e=mc^2 and Etrans and so maybe combing these equations will give the answer but I think this IS not the right to get 5mc^2.

So maybe its E^2tot equation I have to use.

Im just not sure.