What is the Speed of a Proton at Triumf?

  • Thread starter Thread starter erinec
  • Start date Start date
  • Tags Tags
    Proton Speed
AI Thread Summary
To determine the speed of a proton with a kinetic energy of 500 MeV, special relativity must be applied due to the high energy involved. The mass of the proton is given as 938.27 MeV/c², and the correct speed is calculated to be 0.758c, where c is the speed of light. The initial attempt using the classical kinetic energy formula K = (1/2)mv² resulted in an incorrect value of 1.0323c. The relevant equation to use is KE = (gamma - 1)mc², where gamma accounts for relativistic effects. Understanding that "Triumf" refers to a particle accelerator is also essential for context.
erinec
Messages
31
Reaction score
0

Homework Statement


Determine the speed of a proton whose kinetic energy is 500 MeV. The mass of a proton is 938.27 MeV/c2.


Homework Equations


K = (1/2)mv2??



The Attempt at a Solution


The correct answer is supposed to be 0.758c, where c is the speed of light.
Of course, I plugged in the given numbers to the equation and got the wrong answer 1.0323 c. What did I do wrong? What does it mean by "triumf"?

Thanks
 
Physics news on Phys.org
You will need to use special relativity to tackle this problem. Triumf is just a particle accelerator.
 
The formula KE = (gamma -1)mc^2 may be helpful for your endeavors.
where gamma = (1-v^2/v^2)^(-1/2)
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top