Posted by Mat on Thursday, December 20, 2012 at 7:44pm.
Wb = m*g = 2.3kg * 9.8N/kg = 22.54 N. =
Wt. of block.
Fb = 22.54N @ 25o. = Force of block.
Fp = 22.54*sin25 = 9.53 N. = Force parallel to inclined plane.
Fv = 22.54*cos25 = 20.43 N. = Force perpendicular to plane = Normal.
V^2 = Vo^2 + 2ad.
a = (V^2-Vo^2)/2d
a = (0.4225-0)/3.2 = 0.132 m/s^2.
Fn = Fp-u*Fv = ma.
9.53-u*20.43 = 2.3*0.132 = o.304
-20.43u = 0.304-9.53 = -10.02 = -9.23
u = 0.45.
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