The figure (Figure 1) shows a model of a crane that may be mounted on a truck.A rigid uniform horizontal bar of mass m1
= 90.0 kg
and length L
= 5.60 m
is supported by two vertical massless strings. String A is attached at a distance d
= 1.60 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 m2
= 3000 kg
is supported by the crane at a distance x
= 5.40 m
from the left end of the bar.
Throughout this problem, positive torque is counterclockwise and use 9.80 m/s2
for the magnitude of the acceleration due to gravity.