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lala78
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Homework Statement
a ball with a mass of 0.450 g and positive charge of q=31.1 μC is suspended on a string of negligible mass in a uniform electric field. We observe that the ball hangs at an angle of θ=19.0o from the vertical. What is the magnitude of the electric field?
Homework Equations
Force of y component=massxGravity
x component= Force of y component Tan angle
The Attempt at a Solution
converted mass to kg.
F= .00045 X 6.67E-11= 3.00015E-14
3.00015E-14 Tan 19= 1.034E-14
convert to Coulombs.
1.034E-14/3.11E-5
=3.32E-10
but answer in incorrect any suggestions what I am doing wrong?
I tried doing it without converting to kg and got the answer 3.32E-7 and that was wrong as well.