[填空题]
The two masses shownfve;(i*b3v 2 ( pb7ospzsogt6 9 3pe /sv5yxqrxdb)q 9in Fig. 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 the heavier one hits the ground. This is its "launch" spqx p qr39/eb9dy)x5s veed. Assume it doesn't hit the pulley.]
