Practice Problem on Electrical Force for Point Charges



  Q1=+5 micro-C - o-------------o Q2=-1 micro-C
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            4cm | |             |
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                v |             |
  Q3=+4 micro-C - o-------------o Q4=-7 micro-C
                  |-----3cm-----|



4 charges are arranged on a rectangle as shown above. What is the force on charge Q2? Give the x and y components, the magnitude, and the direction. Specify the force to three significant places and the angle to the nearest integer. Use the convention that right is 0 degrees, up is 90 degrees, left is 180 degrees, and down is 270 degrees.

ANSWER = ( Fx = -5.86e+1 N, Fy = 2.78e+1 N, |F| = 6.48e+1 N, angle = 155 degrees )