- #1
fal01
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Homework Statement
Consider three charges arranged as shown.
+ + -
1 2 3
What is the magnitude of the electric field
strength at a point 1.5 cm to the left of the
middle charge? The value of the Coulomb
constant is 8.98755 × 10^9N m2/C2.
Answer in units of N/C
q1=8.2 µC= 8.2*10^-6 C
q2=4.5 µC = 4.5*10^-6 C
q3=−4 µC= -4*10^-6 C
r1,2=4.4 cm= .044m
r2,3= 4.6 cm=.046m
kC= 8.98755*10^9
Homework Equations
F=kC*q1q2/r^2
The Attempt at a Solution
so I am guessing I need to start off with something like this...
F2,1=kC*q2q1/r2,3^s
F2,3= kC * q2q1/r2,3^2
and then find Fnet= F2,1 +F2,3
One of the main things I am struggling with is the 1.5cm (.015m) left of the center point.