Peoples Physics Book Version-2

29.1. Appendix A: Answers to Selected Problems (3e) http://www.ck12.org

14. (a) 0.00912 s
    
    
    1. 0.0058 m/s^2
    
    
    2. 3.5 m/s^2
    
    
    3. 15 m/s
    
    
    4. 49◦S of E
    
    
    
    


15. (b) 4.6 m/s 68◦

Ch 8: Energy & Force

1..
2..
3..
4..
5..

1. 
   
   
   
   7. 18 × 109 J
   
   
   
   


2. 204 m/s


3. 34 m/s @B; 28 m/s @D; 40 m/s @E; 49 m/s @Cand F; 0 m/s @H


4. 30 m


5. Yes, it makes the loop


6. (a) 2.3 m/s (c) No, the baby will not clear the hill.


7. (a) 29,500 J (b) 7.9 m
   8..
   
   
   1. 86 m
   
   
   2. 220 m
   
   
   3. 48.5 m/s
   
   
   4. 128 N
   
   
   
   


8. 0.32 m/s each
   
   
   1. 10 m/s
   
   
   2. 52 m
   
   
   3. 
      
      
      
      1. 1 × 104 N/m
      
      
      
      
   
   
   4. 2 m above the spring
   
   
   
   


9. 96%
   11..
   1..008 m


10. 5.12◦


11. 8 m/s same direction as the cue ball and 0 m/s


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


13. 2.8 m


14. 0.57 m/s


15. Leonora’s


16. 617 J


17. 19.8 m/s