Q.3 A disc of mass M = 5kg and radius R=4m is rotating with an angular velocity of 15rad/s . A constant torque of 50Nm acts on it for 10seconds. Find the following a. Final angular velocity b. Change in rotational KE c. Work done by the torque d. Change in angular momentum

Asked by  | 25th Dec, 2012, 10:40: PM

Expert Answer:

 
 
b. change in rot KE=
the change in rot KE can be found out by putting the values of resp quantities in the above eq.

Answered by  | 26th Dec, 2012, 12:09: PM

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