3
Question 4 in more detail
•
What is the circular velocity of Mercury?
•
*3.*
About 50 km/s.
•
V
c
= (GM/R)
0.5
•
V
c
=
(6.67x10
-11
m
3
/s
2
kg x 2x10
30
kg)
0.5
•
(58x10
9
m)
0.5
•
Tables A-6 for mass of sun, A-13 for Mercury’s
orbital radius
•
V
c
= 50000 m/s = 50 km/s