A horizontal vinyl record of mass 0.109 kg and radius 0.144 m rotates freely about a vertical axis through its center with an angular speed of 4.05 rad/s and a rotational inertia of 3.50 x 10“ kg-m2. Putty of mass 0.0249 kg drops vertically onto the record from above and sticks to the edge of the record.What is the angular speed of the record immediately afterwards? Number i Units
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- In a downtown office building, you notice each of the four sections of a rotating door has a mass of 80 kg. What is the width, in meters, of each section of the door if a force of 66 N applied to the outer edge of a section produces an angular acceleration of 0.500 rad/s²? m FTwo small 0.55-kg masses are attached to opposite ends of a very lightweight rigid rod 0.7 m long. The system is spinning in a horizontal plane around a vertical axis perpendicular to the rod located halfway between the masses. Each mass is moving in a circle of radius 0.35 m at a speed of 0.85 m/s. What is the total angular momentum of this system? kg-m²/s Need Help? Read ItA 10 kg wheel with a 0.4 meter radius is rotating at 4 rad/s. A 8 Nm torque is applied to the wheel. The rotational inertia of the wheel is 0.48 kgm2. The angular momentum of the wheel changes by 4 kg*m2/s. How long was the torque applied to the wheel. - 8 s - 3 s - 4 s - 0.5 s
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