- #1
Winzer
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Homework Statement
The electric potential along the x-axis (in kV) is plotted versus the value of x, (in m). Evaluate the x-component of the electrical force on a charge of 4.05 C located on the x-axis at -13.0 m.
Homework Equations
[tex] E_{x}= -\frac{\partial V}{\partial X} [/tex]
The Attempt at a Solution
Ok So i drew a tangent line at x=-13 and kv[tex]\approx[/tex]62.5
I know I must perform Eq=F for the x-axis.
So I did:
[tex] E_{x}=-\frac{\partial V}{\partial X}=\frac{f(x+h)-f(x)}{h}[/tex]
[tex]\rightarrow\frac{f(-13+h)-f(-13)}{h}[/tex] I broke each cube into 5's vertically and thought 1 would be good to equall h so :
[tex]\frac{f(-12)-f(-13)}{1}[/tex] [tex]\rightarrow \frac{-125-62.5}{1}[/tex]
Sound good so far? My online HW system says I have to be really accurate with these measurements and such