Peoples Physics Book Version-3

http://www.ck12.org Chapter 26. Answers to Selected Problems

2. the last two cars


3. 0.00912 s


4. 0.0058 m/s^2


5. 3.5 m/s^2


6. 15 m/s


7. 49◦S of E


8. 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.
   
   
   1. 29,500 J
   
   
   2. 13 m
      7..
   
   
   3. 86 m
   
   
   4. 220 m
   
   
   5. 48.5 m/s
   
   
   6. 128 N
   
   
   
   


7. 0.32 m/s each
   
   
   1. 10 m/s
   
   
   2. 52 m
   
   
   3. 
      
      
      
      1. 1 × 104 N/m
      
      
      
      
   
   
   4. 2 m above the spring
   
   
   
   


8. 96%
   10..
   1..008 m


9. 5.12◦


10. 8 m/s same direction as the cue ball and 0 m/s


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


12. 2.8 m


13. 0.57 m/s