Since the bar is in equilibrium, the net force must be zero and
the net torque must be zero.
Net force = 0 = TA -TB - 75 x 9.807 - 3000 x
9.807
This gives us the relationship between the two tensions TA and
TB.
Now for the torques. I'll arbitrarily select the left end of the
bar as my origin. Now we have
Net torque = 0 = -TA x 2 - TB x 0 - 3000 x9.807 x 4.8
- 75.00 x 9.807 x (5/ 2 )
TA=-71529.81 N
TB=41373.28 N
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