7. What is the law of inertia for rotation? 11. Which will have the greater acceleration rolling down an incline --a large ball or a small ball?

12. Which will have the greater acceleration rolling down an incline -- a hoop or a solid disk?

19. if a skater who is spinning hold her arms in so as to reduce her rotational inertia to have, by how much will her rate of spin increase?

27. if you walk the long at the top of a fence, why would folding your arms out help you to Balance?

29. The most popular gyroscope around is a frisbee flying disc. What is one function, besides being a place for gripping and catching, of it's somewhat sicker curved rim?

30. consider two rotating bicycle wheels, one filled with air and the other filled with water. which would be more difficult to stop rotating? explain.