- #1
Physicslearner500039
- 124
- 6
- Homework Statement
- Two electrons are fixed 2.0 cm apart. Another electron is shot from infinity and stops midway
between the two. What is its initial speed?
- Relevant Equations
- NA
This is my attempt the system
The 1 is the initial configuration where the 3 electron is at infinity.
The 2 is the final configuration where the 3 electron is midway.U1 is the potential energy between e1 and e2
U1 = (q1*q2)/(4*π*ε0 * (0.02)^2); // q1, q2 charge of electrons
K1 = 0.5*me*V^2; // me mass of electron, V initial velocity to find out.
In configuration 2:
Potential energy = U12 + U13 + U23;
U12 = U1;
U13 = U23 = (q1*q2)/(4*π*ε0 * (0.01)^2);
U1 + K1 = U12 + U13 + U23;
K1 = 2*e2/(4*π*ε0 * (0.01)^2);
I then find the initial velocity, Is my understanding correct? Please advise.