[填空题]
The two masses shown in Fig. 4-52 are each initially 1.80 m above thb 1(dm( z5ybrrrjo; de1a4e1b e grouak;k 5*trmv 6,4uvb vjnd, and the massless frictionless pulley is 4.8 mv4vkjv65t*mk,u ;r ab 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" speed. Assume it doesn't hit the pulley.]
