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proton providing the centripetal force. According to Newton’s second law,
F = mv
2
/
r
,
where
F
is the magnitude of the force,
v
is the speed of the proton, and
r
is the radius of
its orbit, essentially the same as the radius of the sphere. The magnitude of the force on
the proton is
F = eq
/4
πε
0
r
2
, where
q
is the magnitude of the charge on the sphere. Thus,
2
2
0
1
4
eq
mv
rr
ε
=
π
so
()
(
)
2
27
5
2
9
0
92
2
9
1.67 10
kg 3.00 10 m/s
0.0100 m
4
1.04 10 C.
8.99 10 N m / C
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This note was uploaded on 01/25/2011 for the course PHYSICS 17029 taught by Professor Rebello,nobels during the Spring '10 term at Kansas State University.
 Spring '10
 Rebello,NobelS
 Circular Motion, Force

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