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qqchan
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Homework Statement
As part of a carnival game, a 0.523-kg ball is thrown at a stack of 19.5-cm tall, 0.227-kg objects and hits with a perfectly horizontal velocity of 9.9 m/s. Suppose the ball strikes the very top of the topmost object as shown to the right. Immediately after the collision, the ball has a horizontal velocity of 3.15 m/s in the same direction, the topmost object now has an angular velocity of 1.64 rad/s about its center of mass and all the objects below are undisturbed. If the object's center of mass is located 13.0 cm below the point where the ball hits, What is the center of mass velocity of the tall object immediately after it is struck?
Homework Equations
L =pr
I=MR2
p=mv
L=Iω
The Attempt at a Solution
p=mv
p = Iω +mballvball
v = (Iω +mballvball)/(mball*r + I)
v = (I*1.64 +0.523*3.15)/(0.523*0.13 + I)
I have calculated this way. However, the teacher said that the method I used to compute the center of mass velocity is wrong. The I value I calculate was correct tho.I would like to know what I did wrong in the process of solving for the center of mass velocity