Question

30P 0.6 m 450 2 0.8 m 0.2 m 02 m 0.24 m

The union in O and in A are vertical hinges that support forces in the three dimensions and moment around the axes x, y and z. The mass of the arm OA is 2kg, the mass of arm AB is 2.5 kg and that of tray C is 4 kg. The center of mass of each member is in its geometric center. Determine the reactions in O for the configuration shown

Answer 1

There are different reactions will arise about point O due to masses of different Members of components, which is calculated one by one:

Please refer the Figure below for Part AB , which is subjected to different kind of loading, Please refer it (Imagination are very important to understand):

TA-4.8 N-m 65 N 0.8m 2.5 k 4.8 N-mm V40 N
Please refer the figure below for member OA:

The part OA is 30 degree inclined with x axis so we can determine the component of moment and torque about x and z axis.