Question

A window washer with a mass of 93.0 kg stands a distance, D = 0.600 m, from the left end of a plank of length, L= 2.10 m, with a mass of 15.0 kg. The plank is hung on two cables as shown. Find T₂, the tension in the right cable.

Answer 1

here,

mass of the window washer , mw = 93 kg

D = 0.6 m

L = 2.1 m

mass of plank ,m = 15 kg

taking moment of force about the left end

as the torque is zero

mw*g*D + m * g * L/2 - T2 * L = 0

93 * 9.8 * 0.6 + 15 * 9.8*1.05 - T2*2.1 = 0

T2 = 333.9 N

the tension T2 in the right cable is 333.9 N