PLEASE someone help me with this one question!!!!!!!???? :(----:)

Question

PLEASE someone help me with this one question!!!!!!!???? :(---->:)

anonymous · Answer

attachment

mertsj · Answer

f = [ (u)(m)(g) ] / [ cos(x) - (u)*sin(x) ]

mertsj · Answer

Given : 

  Angle ( θ ) = 21o

   Mass ( m ) = 23 kg 

  Static friction μs = 0.56 

   g = 9.8 m/s2
      μs  = F /N 

     F = μs N 

  where N = m g(cosθ + µ sinθ) 

       F = μs mg(cosθ + µ sinθ) 

           =------ N

mertsj · Answer

That is a similar problem I found.  Put in your data and see if it works.

anonymous · Answer

even though it says kinetic friction and not static friction?

mertsj · Answer

I don't know.  Try it and see.  Why don't you google the problem.  You could probably find the exact problem.

anonymous · Answer

well vice versa

anonymous · Answer

i did! and each time i try different ways
and i get different answers from all the different ways. ive tried 4 times only have 3 chances left :/

noelgreco · Answer

First, it should read "19 deg ABOVE the horizontal."

noelgreco · Answer

Can you calculate the force of kinetic friction, and tell in which direction the force of friction is applied?