8
Homework solutions (also on board)
•Question 10   (1 point)What is the circular velocity of Mercury? You will need values from Appendix A of the textbook. You might also find the example in By the Numbers 4-1 on page 62 useful.
 
a. About 5 km/s.  
•b. About 25 km/s.  
•c. About 50 km/s.  
•d. About 75 km/s.  
•e.About 100 km/s.  
•
•Work on board starting from Vc = (GM/R)0.5
•G = 6.67x10-11 m3/kg s2, M=2x1030 kg, R=5.8x107 km