[问答题]
Two blocks, each of fvg*16d;he ib4dd :zfmass m, are at2xddb:2aww) (prl1qv8f p8 h qtached to the ends 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 t8dx 81:arw b 2(ppfd2hl)qvwqorque on this system.
Post time 2025-2-18 20:00:22
