The magnitude of the force of gravity in the y-direction is:
Fgy = - mgcosθ
The maximum frictional force is given by:
Fs = µsN
But N = mgcosθ
Therefore, Fs max = µsmgcosθm
A block with a mass of m = 1.5 kg rests on a wooden plank. The coefficient of static friction between the block and the plank is μstatic = 0.86. One end of the board is attached to a hinge so that the other end can be lifted forming an angle, with respect to the ground. Assume the x-axis is along the plank as shown in figure.
Determine θ in degrees.
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