Peoples Physics Book Version-3

(Marvins-Underground-K-12) #1

http://www.ck12.org Chapter 6. Centripetal Forces


3..


4..


1. 100 N



  1. 10 m/s^2

  2. 25 N towards her

  3. 25 N towards you

  4. 14.2 m/s^2



    1. 1 × 103 N



  5. friction between the tires and the road
    5..0034g



    1. 2 × 105 m/s^2



  6. The same as a.



    1. 56 × 1022 N





    1. 2 × 10 −^7 N; very small force
      8.g= 9 .8 m/s^2 ; you’ll get close to this number but not exactly due to some other small effects



  7. 4× 1026 N

  8. gravity

  9. 2× 1041 kg
    9..006 m/s^2
    1.. 765

  10. 4880 N
    1.∼ 10 −^8 N very small force

  11. Your pencil does not accelerate toward you because the frictional force on your pencil is much greater
    than this force.

  12. a. 4. 23 × 107 m b. 6. 6 Red. The same, the radius is independent of mass



    1. 9 × 107 m



  13. You get two answers forr, one is outside of the two stars one is between them, that’s the one you want,

  14. 32 × 1010 m from the larger star.
    13..
    14..
    1.v=28 m/s
    2.v−down,a−right

  15. f−right

  16. Yes, 640N

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