Peoples Physics Book Version-3

9.1. The Big Idea http://www.ck12.org

2. 40 rad


3. 25 rad/s


4. Force applied perpendicular to radius allowsα


5. 0.27 kg m^2 ,
   6.K^5 =84 J andK^10 =340 J
   3..


6. Moment of inertia at the end 1/3 ML^2 at the center 1/12 ML^2 , angular momentum,L=Iωand torque,τ=Iα
   change the in the same way
   5..


7. Lower


8. Iron ball


9. 200 N team


10. 40 N


11. 0.02 rad/s^2


12. 25 s


13. Coin with the hole


14. Coin with the hole


15. weight


16. 19.6 N


17. plank’s length( 0 .8m)left of the pivot


18. 15.7 N m,


19. Ba. weight, Bb. 14.7 N, Bc. plank’s length( 0 .3m)left of the pivot, Bd. 4.4 N m, Ca. weight, Cb.
    13 .6 N, Cc. plank’s length( 1 .00 m)right of the pivot, Cd. 13.6 N m, f) 6.5 N m CC, g) no, net torque
    doesn’t equal zero


20. 
    
    
    
    7. 27 × 10 −^6 Hz
    
    
    
    


21. 7.27 Hz


22. 100 Hz


23. 
    
    
    
    1. 25 × 105 J
    
    
    
    


24. 2500 J−s


25. 12,500 m−N


26. 0.30 rev/sec


27. 2300 N

MEDIA

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17. b. 771 N,1030 N c. 554 kgm^2 d. 4.81rad/sec^2
    
    
    1. 300 N
    
    
    2. 240N,−22 N
       3.. 092
    
    
    3. 2280 N