- #1
seto6
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Homework Statement
The figure shows two 5.0 g spheres suspended from 1.0-m-long threads. The spheres repel each other after being charged to +31 nC. What is the angle θ ?
Homework Equations
The Attempt at a Solution
i tried it by writing equation in the x and y component for one of the ball and then i would have two unknowns tension and the radius.
now for sin (theta) = r/1
cos (theta) = sqrt(1-r^2)
so for the columbs force the radius would be 2r.
now i solved for r = 4.4108*10^(-5)
this doesn't make sense, i would get the angle to be 2.53*10^(-3)
but the choice for the angles are :
Thanks for helping