Posted by todi on .
1. three point charges, q1, q2, q3, lie along the xaxis at x = 0,3,5, respectively. Calculate the magnitude and direction of the net electric force on q1 if q1 = +6 x 10^6 C, q2 = +1.5 X 10^6 C and q3 = 2.0 x 10^6 C.
my answre is 46.8 N to the right. is that correct?
2. a charge of +2.0 x 10^3 C is placed at the origin, and antoher charge of +4.0 x 10^3 C is placed at x = 2m.
if a test charge, q, of +3 x 10^9 C is placed at 1m, then determine the net electric field at that point.
my answer is 5.4 x 10^7 N/C
is that correct

physics check 
hooker,
yeah your answer to the first question is correct