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Q1: Determine whether the block shown is in equilibrium, and find the magnitude and direction
of the friction force (a) when P = 120 lb. (b) when P = 80 lb. Also, determine the smallest value
of P required to (c) start the block up the incline, (d) keep it moving up.
50 lb
H = 0.40
H = 0.30
40°
30°

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