51 

52 
F_{s} = G m_{1}m_{2}/r^{2
} 
53 

54 

55 
What is r? 2 x R_{earth }Use inverse square law. Distance doubled,
divide by ? 
56 
Does the mass or radius change? 
57 
Try this on a friend (a close friend!) 
58 
Doe we have different formulas for each one? 
59 
Is the acceleration different for each one? 
60 
What happens to the distance(r) when you go up the elevator? 
61 
??? In the first part of the chapter in your book. 
62 
As they move farther apart it goes down by the square distance. What happens
when they get closer? 
63 
chapter 10. Starts with a 'c' 
64 
feeling heavier? 
65 


