Peoples Physics Book Version-3

http://www.ck12.org Chapter 5. Newton’s Laws

8. The towel’s inertia resists the acceleration
   
   
   1. Same distance
   
   
   2. You go farther
   
   
   3. Same amount of force
      9..
   
   
   4. 98 N
   
   
   5. 98 N
      10..
   
   
   
   


9. 32 N


10. 5.7 m/s^2
    13..
    14..
    15.Fx=14 N,Fy=20 N


11. Left picture:F=23N 98◦, right picture:F=54 N 5◦


12. 3 m/s^2 east


13. 4 m/s^2 ; 22. 5 ◦NE


14. 
    
    
    
    0. 51
    
    
    
    


15. 
    
    
    
    0. 2
    
    
    
    


16. The rope will not break because his weight of 784 N is distributed between the two ropes.


17. Yes, because his weight of 784 N is greater than what the rope can hold.


18. Mass is 51 kg and weight is 82 N


19. While accelerating down


20. 686 N


21. 826 N


22. 390 N


23. 490 N


24. 
    
    
    
    0. 33
    
    
    
    


25. 3.6 kg


26. g sinθ


27. b. 20 N c. 4.9 N d. 1.63 kg e. Eraser would slip down the wall

MEDIA

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32. 1. 1450 N

2. 5600 N

3. 5700 N

4. Friction between the tires and the ground


5. Fuel, engine, or equal and opposite reaction


6. b. 210 N c. no, the box is flat so the normal force doesn’t change d. 2.8 m/s^2 e. 28 m/s f. no g. 69 N h. 57 N
   i. 40 N j. 0.33 k. 0. 09
   34..