Mass Distribution and Energy

DoNow: A 1 kg ball is rotated on a 2 m string in a horizontal circular path with a tangential speed of 5 m/s for 10 seconds.

a. Determine the angular or rotational speed of the object in rad/s.
b. Calculate the distance the object travels during the 10 seconds.
c. Calculate the centripetal acceleration of the ball.
d. List possible changes that would create a non-zero angular acceleration of the ball.
(notes)

AIM: I can describe kinetic energy in rotational terms and the variables that affect rotational inertia. I can identify the rotational inertia equations for at least two different distributions of mass systems.

Activities:
- Tableshare & Submit Reduce Reuse Re-Circle HW & Starting to Spin HW
- Tableshare & Review Around and Around HW
- Rotational KE and Inertia Demo (notes)
- How We Roll HW

Textbook Review Ch10.6

Homework:
How We Roll HW, Around and Around HW

Coming Up:
Conservation of Rotational KE
Rotational TEST, Mon., 02Feb15