[填空题]
Tarzan plans to cross a gorge by swinging in an p fv99*n3 hmluarc from a lv2z7ce84a. tugz.wh 9uax/ uhanging vine (Fig. 5–41). If his arms are capable of exerting a force of 1400 N on the vine, what is the maximum speed he can tolerate a 8t9ha7u.uwu ezlgv az.cx/42t the lowest point of his swing? His mass is 80 kg, and the vine is 5.5 m long.
