Practice Problem on Electrical Force for Point Charges



                     Q1=+4 micro-C
                           o
                          / \
                         /   \
                        /     \
                       /       \
                      /         \
                     /           \
                    /             \
                   /               \
                  /                 \
   Q2=-9 micro-C o-------------------o Q3=+6 micro-C
                 |------- 4cm -------|



3 charges are arranged on an equilateral triangle 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 = 4.04e+2 N, Fy = 1.75e+2 N, |F| = 4.41e+2 N, angle = 23 degrees )