Question

2. [2 pts) A pulley is hung from a ceiling by a rope. A block of weight W, is suspended by another rope that passes over the pulley and is attached to the wall. The rope fastened to the wall makes a right angle with the wall Neglect the weight of the rope. (a) Assuming the pulley's weight is negligible, find the tension in the rope from which the pulley hangs and the angle that the rope makes with the ceiling. (b) If the weight of the pulley is not negligible, and in fact it is Wp - 20 N, while the block's weight is W, -50 N, find the angle and the tension in the rope as in part (a).

Answer 1

6 Х . Т. Answer & @ cet the pulley is of o ur negligible weight then Ia los 8= T1 - TL and Tz sind = WB ... [WB T - WB – – Cun Déviding and we get tena - 1 -) 0 = 45° And T2 = WB = & WB it weight of pulley wpa Con and WB=50N Ta sind = wp+ WB - - T2 coso - WB – – W). tanes - 7 - 8 = 54.50 and T2 = 50 = 50 = 86.200 Caso o so

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