(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A proton is on the x axis at x = 1.2 nm. An electron is on the y axis at y = 1.2 nm.

Find the net force the two exert on a helium nucleus (charge +2e) at the origin.

Express your answer using two significant figures. Enter your answers numerically separated by a comma, such that " Fx, Fy = ...,..."

2. Relevant equations

electron charge, e = -1.6*10^-19 coulombs

proton charge, + e = + 1.6*10^-19 coulombs

distance, r = 1.2 nm = 1.2*10^-9 m

constant, k = 9*10^9

force in newtons, F = kq_1q_2/r^2 where q_1 and q_2 represent point charge

3. The attempt at a solution

charge at origin = +2e = 3.2*10^-19 coulombs

Fy = force y axis = electron and origin charge = [(9*10^9)(-1.6*10^-19)(3.2*10^-19)]/(1.2*10^-9)2 = - 3.2*10^-10 newtons

Fx = force y axis = proton and origin charge = [(9*10^9)(+1.6*10^-19)(3.2*10^-19)]/(1.2*10^-9)2 = - 3.2*10^-10 newtons

Fnet = sqrt(Fy^2 + Fx^2) = sqrt(2.048*10^-19) = 4.5255*10^-10 newtons

i entered these and they were wrong:

Fx, Fy = 4.53*10^-10, -4.53*10^-10

Fx, Fy = 3.2*10^-10, -3.2*10^-10

are my calculations correct? what should i enter?

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# Homework Help: Finding net force on charges on xy plane

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