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...
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...