- #1
SnowboardNerd
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Homework Statement
A block weighing 70.6 N rests on a plane inclined at 26.9o to the horizontal. The coefficients of static and kinetic friction are 0.23 and 0.14 respectively. What is the minimum magnitude of the force F, parallel to the plane, that will prevent the block from slipping?
Picture Include!
Homework Equations
F=m*a
us*Fn = static friction
The Attempt at a Solution
I split force of gravity into its components. (Y DIRECTION). I found the Fn to equal mg cos theta
decided that for the X DIRECTION to do
F - usFn - mg sin theta = m * a... then I made A = 0... which made the [ ...left side... = 0 ]
Then I solved for F... which gave me 48.1799 N.
But unfortunately this is wrong. Any Ideas? Thank you!