[问答题]
Two blocks, each of mass 3v2ld2ga :ymjm, are attached to thvm 51 xtb6lsu94 xm-o3p p)adte ends of a massless rod which pivots as shown in Fig. 8–40. Initially the rod is helbxmtso1l94 p a6vux5pt )3 -mdd in the horizontal position and then released. Calculate the magnitude and direction of the net torque on this system.
