Posted by amirah on Tuesday, January 10, 2012 at 2:16pm.
Wb = mg = 1.4 kg * 9.8 N./kg = 13.72 N.
= Weight of block.
Fb = 13.72 N. @ 0 Deg.
Fp = 13.72*sin(0) = 0 = Force parallel to surface.
Fv = 13.72*cos(0) = 13.72 = Force perpendicular to surface.
Fn = Fp-Fk = ma,
0-u*13.72 = 1.4*(-1.2 = -1.68,
-13.72u = -1.68,
u = 0.1224.
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