Answer to "Why get help from a solved problem"
For the same reason your teacher does similar problems dummy...when you see how a similar problem is solved and learn the logic, you can then apply that to your problem. I apologize the link did not copy properly, for you could see the solved...
Homework Statement
A large hollow hamster ball is rolling along the ground at 5 miles per hour. A hamster is running inside, matching his pace at the bottom of the ball to stay by the ground. The hamster weighs .3 kg, and the ball has a mass of 1.5 kg with a radius of 0.4m.
Homework...