he weights of the two boxes are W1 = 120 lb. and W2 = 80 lb. The coefficients of riction between the left box (W1) and the inclined surface are µ, = 0.25 and µk = 0.2. Petermine the following: a. The maximum tension the man must exert on the rope for the box to remain stationary. b. The tension the man must exert on the rope to pull the boxes upward at a %3D constant rate.

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British Gravitational Bg System Of Units

Measuring is the comparison of a particular physical quantity with its reference value. A unit is a fixed physical quantity. The length is a physical quantity. A physical quantity is the product of a unit and the numerical value we need to compare with.