Homework Answers
Part A )
given
m = 1 kg
q1 = 5 u C
= 5 x 10-6 C
q2 = -3 u C
=- 3 x 10-6 C
r = 0.5 m
using equation for force is F = k | q1 q2 / r2 |
= 9 x 109 x | 5 x 106 x 3 x 106 / 0.52 |
F = 0.54 N
the net weight of the sphere of the charges is - 3 x 10-6 C
W = m g - F
= 1 x 9.8 - 0.54
W = 9.26 N
so the reading on the scale is 9.26 N.
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