A point charge with a charge q1 = 2.40 μC is held stationary at the origin. A second point charge with a charge q2 = -4.50 μC moves from the point x= 0.140 m , y=0 to the point x= 0.290 m , y= 0.290 m .
Part A
How much work is done by the electric force on q2?
___ J
W = k*q(1)*q(2)*[1/r(1) - 1/r(2)]
k = 9*10^9 Nm^2/C^2
okay, r(1) is the distance from the origin to your starting
point
r(1) = .140 m
r(2) is the distance from the origin to your ending point
r(2) = sqrt(.29^2 + .29^2)
r(2) = 0.4101
you have q(1) and q(2) in the question
W = k*q(1)*q(2)*[1/r(1) - 1/r(2)]
W = 9*10^9*2.40*10^-6*(-4.50*10^-6)*(1/.14 - 1/.4101)
W = -0.4572 J
A point charge with a charge q1 = 2.40 μC is held stationary at the origin....
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