Question

A 10-ft wooden beam weighing 120lb is supported by a pin and bracket at A and by cable BC. Find the reaction at A and the tension in the cable

Answer 1

at equilibrium all the moments of the forces about point A would be zero as there is no rotation of the beam
u will get T(tension of the string) from it..
as there is no translational motion of the beam..so all the forces act on the beam adds to zero..
u will get R (reaction at A) from here..