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tuggler
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Homework Statement
A metal sphere hangs from a string and has 6 kg of mass. The sphere has a charge of +3.7 µC. A uniform electric field is turned on and directed to the right.
(a). What is the electric force on the metal sphere if the magnitude of the electric field is
106 N/C?
(b). When the sphere reaches equilibrium, what is the angle that the string makes with the vertical axis (assuming the same electric field as part (a))?
Homework Equations
[tex]F =ma[/tex] and [tex]F = Eq[/tex]
The Attempt at a Solution
I worked out (a) and got the force to be 3.7 N, but I don't know how to do part (b)?