Another question for all the Physics Experts here.
Please help me out , friends!
A disc of mass 200 kg and radius 0.5 m is rotating at the rate of 8 revolutions per second. Find the constant torque required to stop the wheel in 11 rotations.
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Firstly find 'w'
w=2pif=2*pi*8=16pi
Now apply 3rd law of motion as time is not known;
w(final)=0
w(initial)=16pi
theta or angular dispacement=11*2pi(as 360degree is 2pi)
0=(16pi)^2 - 2*@*11*2pi (@ is ang. acc.)
once u find @ u can calculate torque as torque is equal to "i@".hope this helps u!!!!
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