Question

In: Physics

Two tiny objects with equal charges of 83.0

Two tiny objects with equal charges of 83.0

Solutions

Expert Solution

Problem solved for 77 microcoulomb and side of square 0.29 metre

Force from just below A.

d = 0.290 m
k = 9*10^9
q1 = 0.77 *10^-6 C

E = kq1/d^2
E = 9*10^9*0.77*10^-6/(0.29)^2
E =82400 N/q

Force from charge on the same diagronal as A
==================================
d = sqrt(0.29^2 + 0.29^2) A diagronal of a square = sqrt(side^2 + side^2)
d = 0.410 m

E2 = k*q1/d
E2 = 9*10^9 * 0.77 * 10^-6/(0.410)^2
E2 = 41200 N/q

Summing the Fields.
Vertical
Total Vertical = 82400 + 41200*Sin(45o)
Note the angle a diagonal makes with with vertical is 45o
Total Vertical = 82400 N/q + 29100 N/q
Total Vertical = 111500 N/q

Total Horizontal = 41200 * cos(45o)
Total Horizontal = 29100 N/q

Left Corner A
===========
E = 29100 N/q
d = ??
k = 9*10^9
q1 = 0.77 *10^-6

d^2 = kq1/E
d^2 = 9*10^9 0.77*10^-6 / 29100
d^2 = 0.2381 m^2
d = sqrt(0.2381)
d = 0.488 m
q1 must be put 0.488 to the left of A.

Vertical
======
Eq = 111500 N/q
k = 9*10^9
q1 = 0.77 * 10^-6

d^2 = k*q1 / Eq
d^2 = 9*10^9 * 0.77*10^-6 / 111500
d^2 = 0.0622 m^2
d^2 = 0.249 m above A


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