Peoples Physics Book Version-3

http://www.ck12.org Chapter 8. Energy and Force

1. 
   
   
   
   1. 1 × 104 N/m
   
   
   
   


2. 2 m above the spring


3. 96%
   10..
   1..008 m


4. 5.12◦


5. 8 m/s same direction as the cue ball and 0 m/s


6. vgol f=− 24 .5 m/s; vpool= 17 .6 m/s


7. 2.8 m


8. 0.57 m/s


9. Leonora’s


10. 617 J


11. 19.8 m/s


12. 8.8 m/s


13. 39.5 m


14. 89 kW


15. 
    
    
    
    0. 4
    
    
    
    


16. 15.1 m/s


17. 43.8 m/s
    15..
    16..
    17..


18. 
    
    
    
    3. 15 × 105 J
    
    
    
    


19. 18.0 m/s


20. 2.41 m


21. 7900 J
    1.v 0 / 14
    2.mv 02 / 8


22. 7mv 02 / 392


23. 71%