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March 31, 2015

March 31, 2015

Posted by **Riya** on Thursday, March 29, 2012 at 10:40pm.

rad/s

Honestly, I don't know how to calculate this, I have been trying to figure out but I have been guessing, and am sure they aren't write because they gave me wrong answers. Need help thank you in advance.

- physics -
**drwls**, Thursday, March 29, 2012 at 11:25pmSince the bearings are frictionless, the total angular momentum of wheel and guinea pig remains zero, as they rotate in opposite directions.

0.18 m/s*0.550kg*0.44m

= 0.04356 kg m^2/s

= -Iwheel*w

The moment of inertia of the wheel is

Iwheel = M*R^2 = 1.90*(0.44)^2

= 0.3678 kg*m^2. Therefore

w = -0.118 rad/s

The minus sign indicates that it is turning in the opposite direction from the guinea pig.

- physics -
**Riya**, Thursday, March 29, 2012 at 11:41pmThank you so much; I really appreciate it!

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