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rlc
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Homework Statement
In the figure, two conducting balls of identical mass m = 20 g and identical charge q hang from nonconducting threads of length L = 100 cm. If x = 5.9 cm, what is q? Since x is much smaller than L approximate sin(θ) by θ.
Homework Equations
Tcos theta = mg
Tsin theta = ((kq^2)/x^2)
(x/(2L) = (kq^2)/(mgx^2))
The Attempt at a Solution
Tcos theta = mg
Tsin theta = ((kq^2)/x^2)
Tan theta = sin theta/cos theta
solve for tangent
(x/(2L) = (kq^2)/(mgx^2))
then solve for q
This is what a classmate of mine posted as a way to solve the problem, but it hasn't been working for me. Does this look like the right method? What does the T before cos and sin mean?
Is it necessary to calculate theta, by sin(theta)=(0.059m/2)/(1 m) ...theta=1.69 deg ?