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April 20, 2014

April 20, 2014

Posted by **Anonymous** on Tuesday, November 6, 2012 at 3:01pm.

- Physics- Elena please help! -
**Elena**, Tuesday, November 6, 2012 at 3:39pmNnewton’s 2 Law for rotation

M = I•ε,

where angular acceleration ε=0.87 rad/s²,

the torque M = F•R ,

the moment of inertia I=mR²/2 ,

F•R= m•R²•ε/2,

m=2•F/R•ε=2•180/0.45•0.87=919.54 kg

I=mR²/2=919.54•0.45²/2=93.1 kg•m².

ω= ε•t=0.87•8=6.96 rad/s

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