The wheel on a vehicle has a rotational inertia of 2.0 kg*m^2. at the instant the wheel has a counterclockwise angular velocity of 6.0 rad/s, an average counterclockwise torque of 5.0 n*m is applied, and continues for 4.0 s. what is the change in angular momentum of the wheel?
Answers: 1
is the torque applied to the object
is the variation of angular momentum
is the time interval
and 
, so keeping in mind that the torque is in the same direction of the initial angular speed of the object (therefore, the variation of angular momentum should be positive), we have
.
Angular velocity = 6.0 rad/sTorque = 5.0 NmTime = 4 seconds
is the change in angular momentum.
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