Question



passes over a massless, frictionless pulley. One end of the rope is connected to box 2, and the other end is connected to box 3. The weights of the three boxes are W, = 55 N, w, = 35 N, and W3 - 28 N. Determine the magnitude of the normal force that the table exerts on box 1.
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Answer #1

Solution :-

Due to the box 3 over the pulley, the upward force on box 2 is the weight of box 3. The normal force exerted on box 1 by the table is therefore the weight of box 1 plus the difference of weights of box 2 and 3.

F = W1+W2-W3

F = 55 + 35- 28

F = 62 N

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