Recent content by ShootingStars

  1. S

    The Physics of Friction: Why Rough Wood Has More Friction

    in my mind i am thinking smooth wood - more contact between object and surface - more friction rough wood - less contact b/t object and surface - less friction can someone explain why this is wrong; why rough wood has more friction? i know rough wood WOULD have more friction but need to...
  2. S

    Anyone know how to solve these problems (DYNAMICS)?

    so how i go about solving these =[
  3. S

    Anyone know how to solve these problems (DYNAMICS)?

    Homework Statement http://img117.imageshack.us/img117/2513/55200915619am.jpg http://img217.imageshack.us/img217/2817/55200915545am.jpg For the first one I got 1100 N for F(A) and 981 N for F(G)... how do I do the rest? Homework Equations F(T)-F(K) = MA to get F(A) The Attempt...