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October 21, 2014

October 21, 2014

Posted by **COFFEE** on Sunday, March 25, 2007 at 10:28pm.

consists of three particles connected by massless rods. It is to be rotated about an axis perpendicular to its plane through point P. If M = 0.40 kg, a = 35 cm, and b = 55 cm, how much work is required to take the body from rest to an angular speed of 5.0 rad/s?

*My work so far*

I believe I need to use:

W = (1/2)(I)(ang speed)^2

I am not sure how to find I though. Would I use I = I1 + I2 + I3 and calculate I for each of the 3 masses?

- Physics - KE/Inertia -
**Anonymous**, Thursday, March 20, 2008 at 6:20pm1.51

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