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12.68:
a) The SI units of energy are
,
s
m
kg
2
2
⋅
so the SI units for
φ
are
.
s
m
2
2
Also,
it is known from kinetic energy considerations that the dimensions of energy, kinetic or
potential, are
,
speed
mass
2
×
so the dimensions of gravitational potential must be the

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