physics question?

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A box weighing 70N rests on a table. A rope tied to the box runs vertically upward over a pulley and a weight is hung from the other end. Determine the force that the table exerts on the box if the weight hanging on the other side of the oulley weighs (a) 30N (b) 60N and (c) 90N.

2006-12-10 09:14:12 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics

2 answers

a) 40N
b) 10 N
c) 0N, the box would be off the table at that point.

2006-12-10 09:20:46 · answer #1 · answered by feanor 7 · 0⤊ 0⤋

It might depend on the friction force between the rope and the pulley, it will depend on the friction of the pulley on its axle and the weight of the rope on either side of the pulley.

2006-12-10 17:19:55 · answer #2 · answered by Anonymous · 0⤊ 0⤋