A scaffold of mass 53 kg and length 6.5 m is supported in a horizontal position by a vertical cable at each end. A window washer of mass 80 kg stands at a point 1.7 m from one end.(a) What is the tension in the cable closer to the painter? _______________N(b) What is the tension in the cable further from the painter? _________________N
Static Equilibrium: ΣTorques: 53g(3.5) + 80g(4.8) = T(6.5) {where T = ANS (a) (53)(9.8)(3.5) + (80)(9.8)(4.8) = 6.5T 1817.9 + 3763.2 = 6.5T 5581.1 = 6.5T T = 5581.1/6.5 = 859 N ANS (a) Total weight = (53 + 80)(9.8) = 1303 ANS (b) = 1303.4 - 858.6 = 444 n
