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Homework Statement
http://imgur.com/fvNbE
Part a needs to have up to 2 significant figures.
For part b. you need to find theta or the degrees counter clockwise from +x direction.
Homework Equations
Coulombs Law:
F = 9(10^9) |q1q2|/r^2
r = distance in meters of two charges
The Attempt at a Solution
Part A.
F(Q on q1) = 9(10^9) N*m^2/C^2 * (2*10^-6 C)(4*10^-6 C) / (0.5m)^2
= 0.288 N
F(q2 on q1) = 9(10^9) N*m^2/C^2 * (2*10^-6)^2 / (0.60m)^2
= 0.1 N
|F| = sqroot( (0.288 N)^2 + (0.1 N)^2 ) = 0.304867 N *I know this is wrong because I tried to submit this answer and it was no go.*Part B.
atan(0.1 N/0.288 N) = 19.148 degress
180 - 19.148 = 160.852 degress
*For this part I figured I take 180 and subtract the degrees obtained to get the degrees counter clockwise of the +x direction.