[问答题]
Two blocks, each of mass m, are atta8qy0yu3 jfc- 4s +kzq8kcii7-jdghl*ched to the endsuo:u u92i+6 6-o qxhfi adxm julw-c4zl7sh2, of a massless rod which pivots as shown in Fig. 8–40. Initially the rod is held in the horizontal position and then released. Calculate the magnitude and direction of the net torque on uo,sd i7a h46qm lxi+-jzcfo x6lu u2:29hwu -this system.