A playground merry-go-round has a radius of 3 m and a rotational inertia of 600 kg · m2 . It is initially spinning at 0.8 rad/s when a 20 kg child starts crawling from the center toward the rim. When the child reaches the rim, what is the new angular speed of the merry-go-round? Ignore the friction force on the axle of the merry-go-round.
A. 1.1 rad/s
B. 0.73 rad/s
C. 0.8 rad/s
D. 0.62 rad/s
E. 0.89 rad/s
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Conservation of Angular Momentum concept. You can view video lessons to learn Conservation of Angular Momentum. Or if you need more Conservation of Angular Momentum practice, you can also practice Conservation of Angular Momentum practice problems.
How long does this problem take to solve?
Our expert Physics tutor, Juan took 3 minutes and 32 seconds to solve this problem. You can follow their steps in the video explanation above.
What professor is this problem relevant for?
Based on our data, we think this problem is relevant for Professor Stephens' class at TEXAS.