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A 2.5-kg mass is sliding on a horizontal frictionless surface with a speed of 6.1 m/s when it collides with a 4.2-kg mass initially at rest
as shown in the figure. The masses stick together and slide up a frictionless circular track of radius 0.40 m. The maximum height, h,
above the horizontal surface, in cm, for the masses to rise is most nearly
0.40 m
h
I
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