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**Unformatted text preview: **Potential of a point charge
Q
! 2
r â‰¡ âˆ‚t
Â¨ kQq
Potential energyEp =
r
kQ
Electric Potential of a point charge V =
Î¦
r multiply by r
Ë™
ï¿¿ 2ï¿¿
ï¿¿ï¿¿
k Qq
r
Ë™
kQq
1
=
âˆ‚t
r=âˆ’
Ë™
âˆ‚t
2
2
mr
m
r
ï¿¿2
ï¿¿
r
Ë™
kQq
âˆ‚t m +
=0
2
r
Energy
Thursday, September 16, 2010 q,m Î¦
V(r)? Solving equations of
motion, the hard way F
k Qq
a=r=
Â¨
=
m
m r2
r â‰¡ âˆ‚t r
Ë™ r ...

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