Peoples Physics Book Version-3

20.1. The Big Ideas http://www.ck12.org

2.γ=∞, the width approaches zero as the ship’s speed approaches the speed of light in that direction

3..
4..
5.γ= 1. 002
6. 9. 15 × 107 m/s

1. 0.659 km


2. 
   
   
   
   22. 4
   
   
   
   


3. 
   
   
   
   4. 92 × 10 −^5 m/s
   
   
   
   


4. 14.7 km


5. 2900 m


6. 
   
   
   
   1. 34 × 10 −^57 m
   
   
   
   


7. 0.303 s
   10..


8. 
   
   
   
   2. 9 × 10 −^30 kg, yes harder to accelerate
   
   
   
   


9. f


10. c


11. 
    
    
    
    4. 5 × 1016 J; 1. 8 × 1013 softballs
    
    
    
    


12. 
    
    
    
    1. 568 × 10 −^13 J
    
    
    
    


13. 
    
    
    
    3. 04 × 106 J