[填空题]
The two masses shown iie ljh-yd: /g8n v (d,f4lfd,cq (gcawha,)3b n3 ojp 7hFig. 4-52 are each initially 1.80 m above the ground, and the massless frictionless pulley is 4.8 m above the ground. What maximum height does the lighter object reach after the system is released? [Hint: First determine the acceleration of the lighter mass and then its velocity at the moment th)cfh3hd,dj na(3avo4w g(fq l ,p7cb ,e heavier one hits the ground. This is its "launch" speed. Assume it doesn't hit the pulley.]
