- #1
Glendon Koss
Homework Statement
Four protons (each with mass 1.7
Homework Equations
Uelectric = (1/4πϵo)(q1q2/r)
The Attempt at a Solution
Ef = Ei
K1 + K2 + K3 + K4 = U1,2 + U2,3 + U3,4 + U4,1 + U1,3 + U2,4
U1,2 = U2,3 = U3,4 = U4,1
and
U1,3 = U2,4
U1,2 = (1/4πϵo)(1.6E-19)2/7.1E-9 = 3.245E-20 J
U1,3 = (1/4πϵo)(1.6E-19)2/√2(7.1E-9) = 1.933E-24 J
U1,2 + U2,3 + U3,4 + U4,1 + U1,3 + U2,4 = 4(3.245E-20) + 2(1.933E-24) = 1.298E-19 J
K1 + K2 + K3 + K4 = 1.298E-19 J
I'm not sure where to go from here. How do I get the final speed of each proton?