- #1
Quantum Fizzics
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- 0
Homework Statement
given mass: 100g(the one hanging)
Q1 = -30(mu)C
Q2 = 70(mu)C
Q3 = 50 (mu)C
T=?
Length of tube = 2m
Length of rope = 1m
Homework Equations
Ft + Fg + Felect =0
F =k *q1*q3/d2
The Attempt at a Solution
Those were the equations I have done so far, so the answer is 46N & the answer I got was -45N(ref dir) but I'm not sure if I have done it right here is the diagram : http://gyazo.com/1d33f7708faf12ffea9138b7c2ee6eac
How I did it at first:
Ft (+)Fg(+)Felect(+) = 0
Ft+ 0.1(10) + 9x10^9x70x10^(-6)x50x10^-6/1
FT= -31.5N
F13 = kxq1xq3/d2
= 9x10^9(-30x10^-6)(50x10-6)/1^2
F13= +- 13.5N
then I added them both