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**1. The problem statement, all variables and given/known data**

The force exerted by an electric charge at the origin on a charged particle at point (x,y,z) with position vector r = <x,y,z> is F(r) = Kr / |r|^3

where K is a constant. Find the work done as the particle moves along a straight line from (2,0,0) to (2,1,5).

**2. Relevant equations**

**3. The attempt at a solution**

So if it moves from (2,0,0) to (2,1,5) I can parametrize:

x = 2

Y = T

Z = 5T

for 0<t<1

so r(t) = (2, T, 5T)

r'(t) = (0, 1, 5)

But how do I put the force function F(r) = Kr / |r|^3 in terms of these parameters so I can do the integral?