Drawing Three
The drawing shows three point charges fixed in place. The charge at the coordinate origin has a?
q1 = +8.50 µC; the other two have identical magnitudes, but opposite signs: q2 = -5.00 µC and q3 = +5.00 µC.
http://img66.imageshack.us/my.php?image=p1818mv9.gif
(a) Determine the net force (magnitude and direction) exerted on q1 by the other two charges.
direction ___________ ° (measured counter clockwise from the x-axis)
this is not a difficult problem; it only requires some amount of algebraic work.
first, of course u need the formula: F = E (q1) (q 2)/ distance^2
do the same with q 1 and q 3. but make sure u include the plus or minus sign to determine if it is a attractive or repulsive force.
after u got all the values, use cos and sin to determine the forces in x and y direction.
then summation the forces and use tan ( angle) = y force / x force
this should help. try it out.
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