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Part A

 If two electrons are each 2.30x10^-10m from a proton, as shown in the figure, find the magnitude and of the net electrical force they will exert on the proton.

Part B

Find the direction of the net electrical force electrons will exert on the proton.

Enter your answer as an angle measured relative to the line connecting the proton and the right electron with counterclockwise being positive.
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Added Thu, 27 Aug '15
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The force between one electron and proton

= K * Q^2/R

Q = charge of electron or proton (both have the same charge )

R = distance between them

K = 9 * 10^9

so

= 9 * 10^9 * 1.6 * 10^-19 * 1.6 * 10^-19 /(2.3 * 10^-10)^2

= 4.36 * 10^-9 N

same force with other electron and proton

so

Net force = 1.685 * 4.36 * 10^-9 N

= 7.347 * 10^-9 N

And the direction is 65/2 = 32.5 degrees counterclockwise
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Added Thu, 27 Aug '15
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