(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Mass= 15g

Q1= 8.0uC

Q2= 25 uC (stationary)

Q1 is released from a point 12cm from Q2. How fast will Q1 be moving when the separation is 20cm.

2. Relevant equations

F=ma

F=qe

F=kQq/r^{2}

E=kQ/r^{2}

Ke=mv^{2}/2

W=FD

vf^{2}=vi^{2}+2ad

3. The attempt at a solution

F=(9x10^{9})(25x10^-6)(8x10^-6)/(.12^2)

F=125N

F=MA

125/0.015= A

A= 8333m/s^{2}

vf^{2}=vi^{2}+2ad

vf^{2}=0+2(8333)(.20-.12)

vf=36.5m/s

ACTUAL ANSWER IS : 28.3 according to the answer key

Thanks for help!

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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