In the figure below is shown three point charges sitting on the x-axis (the figu
ID: 1879948 • Letter: I
Question
In the figure below is shown three point charges sitting on the x-axis (the figure is not to scale). The three charges have the charge and position:
Q1 = 1.97x10-6 C, x1 = -7.15 cm
Q2 = -2.411x10-6 C, x2 = 2.98 cm
Q3 = -4.26x10-6 C, x3 = 0 m
What are the magnitude and direction of the total electrostatic force that on Q3? For the magnitude, give your answer in Newtons to at least 3 significant digits (to avoid a round-off error). The sign of your answer will give the direction, positive is to the right and negative is to the left.
3 Q1 02Explanation / Answer
before we attempt this question, let's look at the signs , Q1 will exert force of attarctionbon Q3 , while Q2 will exert force of repulsionon Q3, so in net Q3 will experience force towards Q1
F net = K ( Q1Q3) x1^2 + K ( Q2 Q3)/ x2^2
plugging the values
F net = - 9 x 10^ 9 x 4,26 x 10^-6 x 10^-6 { 1.97/0.00511225+2.411/0.00085264}
= -123.188 N apprx