The figure shows a model of a crane that may be mounted on a truck.A rigid unifo

Question

The figure shows a model of a crane that may be mounted on a truck.A rigid uniform horizontal bar of mass = 90.00 and length = 5.200 is supported by two vertical massless strings. String A is attached at a distance = 1.900 m from the left end of the bar and is connected to the top plate. String B is attached to the left end of the bar and is connected to the floor. An object of mass = 3500 kg is supported by the crane at a distance = 5.000 from the left end of the bar. Throughout this problem, positive torque is counterclockwise and use 9.807m/s^2 for the magnitude of the acceleration due to gravity.

Explanation / Answer

let us balance torque through point B,
mg1l/2 +mg2x -T1*d=0

so T1=(mg1l/2 +mg2x)/d =9333.68 N

using force balance

T2= - T1+m2g = 24990.82

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