Complicated Torque

DoNow: Two kids are using a 10.0 m long see-saw with a mass of 120 kg. One has a mass of 40.0 kg, while the other has a mass of 50.0 kg.
(a)  Calculate the Moment of Inertia of the system.
(b)  Determine the angular acceleration of the system.
(c)  How long does it take for the beam to rotate 0.17 radian
(d)  In this position, what is the angle between the moment arm and the force of gravity?
(notes)

AIM: I can describe how to determine torque, net torque and relationships to forces at a distance when angular acceleration is zero or the system is static.

Activities:

- Submit What Goes Around HW
- Tableshare & Review Comes Around HW
- Review Balance Design Experience & BONUS

- Well Balanced Meal WB
- Ranking
- Time to Torque HW

Textbook Review: Ch 11.4-.5

Homework:
Time to Torque HW, Balance Design Experience, Comes Around HW

Coming Up:
More Torque
Semester Photo Project, Photo 1 Due: 09Feb15
Balance Design Experience & BONUS, Due: Friday, 13Feb15
Torque TEST, Dun-dun-DUUUN!