A window washer is standing on a scaffold ted by a vertical rope at each end. Th

Question

A window washer is standing on a scaffold ted by a vertical rope at each end. The old weighs 200 N and is 3.00 m long. What is the tension in each rope when the 700-N worker stands 1.00 m from one end? [567 N, 333 N] A beam resting on two pivots has a length of L = 6.00 m and a mass M = 90.0 kg. One pivot is to the far left while the other is a distance I = 4.00 m from the left edge of the beam. A woman of mass m = 55.0 kg starts walking along the beam as shown. At what distance x from the left edge of the beam will the woman be just as the beam starts to tip? [5.63 m]

Explanation / Answer

6 ) Let T1 and T2 be tensions

=> For rotational equilibrium

=> T2 * 3 = 200 * 1.5 + 700 * 1

=> T2 * 3 = 1000

=> T2 = 333 N

=> T1 = 900 - 333

              = 567 N

=> Tension in each rope = 333N and 567 N

7)    Here, as, beam starts to tip , Normal force at left beam = 0 N

=> 90 *1 = x1 * 55

=> x1 = 1.63 m

=> distance x from left edge of beam = 4 + 1.63

                                                               = 5.63   m

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