I interpreted it the same way. I believe the angular velocity at the end of the manouvre would also be zero. So it wouldn't increase or decrease but would stay the same?
I tried 1F 2F 3F 4F 5F 6F 7F 8F 9T 10T, but got it incorrect. So for 2, the angular velocity would depend on the direction the weights are thrown from right? As for 5, it would not change right so 7 would be true?
There wasn't a diagram provided with the question, but yes the student is indeed in the center of the platform and the arms are stretched out. I should have wrote "which one(s)"
For the 1st and the 10th I'm mostly stuck on the "starting at rest" part. Thinking of the student as a point mass, I...
1)Starting at rest, he brings the weights into his chest. His angular velocity increases.
2)A friend throws a third weight so that the student catches it in one of his outstretched hands. No matter what the direction of the throw, the student's angular velocity decreases.
3) Starting with...