**Practice Problem on Electrical Force for Point Charges**
Q1=+1 micro-C
o
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
Q2=-8 micro-C o-------------------o Q3=+1 micro-C
|------- 4cm -------|

3 charges are arranged on an equilateral triangle as shown above.
What is the force on charge Q_{2}?
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 = ( F_{x} = 6.74e+1 N, F_{y} = 3.89e+1 N, |F| = 7.78e+1 N, angle = 30 degrees )