[填空题]
The two masses shown in 0/zgi,qvu(7 f8aix1aaz na2geg ;v:iFig. 4-52 are each initially 1.80 m above the gim x t 6zbpdo:4k(lve; rvn/ 0p8znq0d4 o1;xwround, 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 ma4ei0;0kox n vb:;p 4qdrxzwmdvp/on( 6 zlt 18ss and then its velocity at the moment the heavier one hits the ground. This is its "launch" speed. Assume it doesn't hit the pulley.]
