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The Motif
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Homework Statement
Two identical small charged spheres hang in equilibrium with equal masses as shown in the figure. The length of the strings are equal (0.21 m) and the angle (shown in the figure) with the vertical is identical (7 degrees). The acceleration of gravity is 9.8 m/s^2 and the value of Coulomb's constant is 8.98755e9. Find the magnitude of the charge on each sphere. Answer in units of C.
*The masses are 0.02 kg.
Homework Equations
F(tension)=mg
F(electrical)=KQ1Q2/r^2
The Attempt at a Solution
I know I have to find F(electrical) first and it is equal to the X-component, but I am completely lost otherwise. Thanks.