A detailed explanation, step by step, would be greatly appreciated! I\'m not sur

Question

A detailed explanation, step by step, would be greatly appreciated! I'm not sure where to start =(
Thank You~

Problem 18.04 Part A A point charge q1 = +2.40 C is held stationary at the origin. A second point charge q,--4.30 C moves from the point What is the change in potential energy of the pair of charges? Express your answer in joules to three significant figures. 0.150m , y- 0, to the point0.240m 0.240m. y Submit My Answers Give Up Part B How much work is done by the electric force on q2? Express your answer in joules to three significant figures. W- Submit My Answers Give Up

Explanation / Answer

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) = 0.150 m

r(2) is the distance from the origin to your ending point
r(2) = sqrt(0.24^2 + 0.24^2)
r(2) = 0.3394 m

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*(-4.30*10^-6)*(1/0.15 - 1/0.3394)

W = - 0.345 J

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