- #1
Mdhiggenz
- 327
- 1
Homework Statement
The mass of a proton is 1836 times the mass of an electron.
A) A proton is traveling at speed . At what speed (in terms of ) would an electron have the same kinetic energy as the proton?
B) An electron has kinetic energy K . If a proton has the same speed as the electron, what is its kinetic energy (in terms of K )?
Homework Equations
The Attempt at a Solution
The answer for A is 42.85, and to get it here is what I did.
Kp-ke=0
Kp=Ke
1/2mv^2=1/2(1836m)v^2
Ve=squareroot(2*918vp)=42.85
Part B the answer is 1836
But I have no clue on how to get it. Since their velocities are equal I was thinking of setting them both to 1.
1/2m(1)^2=1/2(1836m)(1)^2
I don't know what to do after this.. tried solving for M but that doesn't make sense.
Thank you