According to conservation of angular momentum, if the moment of inertia of a rotating object is changed in the absence of an external torque, what will happen to the motion of the object? angular velocity will change with the inverse of the change to the moment of inertia angular position will change proportionally to the change in the moment of inertia angular velocity will change proportionally to the change in the moment of inertia angular acceleration will change proportionally to the change in the moment of inertia angular acceleration will change with the inverse of the change to the moment of inertia

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An electric motor rotating a workshop grinding wheel at 1.08 x 10 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 2.06 rad/s? (a) How long does it take the grinding wheel to stop? Note that the time required for the wheel to stop is the same as the time for the wheel to start from rest and reach the given angular speed with the same magnitude angular acceleration, s (b) Through how many radians has the wheel turned during the time interval found in part (a)? It might be helpful to translate this problems into linear variables (a car traveling with an initial speed and then slowing down with a constant negative acceleration), rad Need Help? Road Master

(a)What is the moment of inertia (in kg · m2) of the system about the given axis?  kg · m2 (b)If the system rotates at 4.6 rev/s, what is its rotational kinetic energy (in J)?  J

A wheel with a radius of 0.4 meters initially at rest and begins to accelerate at 4 rad/s2. If the same constant torque was applied at the edge of the wheel, which of the following changes would decrease the acceleration of the wheel? (Select two right answers) Increase the radius of the wheel Decrease the mass of the wheel Increase the mass of the wheel Decrease the radius of the wheel

A figure skater is spinning with an angular velocity of +11.9 rad/s. She then comes to a stop over a brief period of time. During this time, her angular displacement is +3.54 rad. Determine (a) her average angular acceleration and (b) the time during which she comes to rest. (a) Number  Units                                                            (b) Number  Units