chap45, p45 036

background image

36. From F

grav

= GM m/r

2

= mv

2

/r we find M

∝ v

2

. Thus, the mass of the Sun would be

M



s

=



v

Mercury

v

Pluto



2

M

s

=



47.9 km/s

4.74 km/s



2

M

s

= 102M

s

.


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