[填空题]
In a physics lab, a cube slides down a frictionless une89fr:4,hom9i aou;n 8 kfkzg ;z9 8+rbf* *iilsyy ,wfo6s incline as shown in Fig. 7–35, and elastically strikes another cif isl;*wy rb,g f9syzoz+6 8*ube at the bottom that is only one-half its mass. If the incline is 30 cm high and the table is 90 cm off the floor, where does each cube land? [Hint: Both leave the incline moving horizontally.]$\Delta x_{m}$$\approx$ m $\Delta x_{M}$$\approx$ m
