With the same mass and same outer radius are each

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with the same mass and same outer radius are each free to rotate about a fixed axis through its center. Assume the hoop is connected to the rotation axis by light spokes. With the objects starting from rest, identical forces are simultaneously applied to the rims, as shown. Rank the objects according to their angular momenta after a given time t , least to greatest. (Eqn of Motion in Angular Form) a. all tie b. disk, hoop, sphere c. hoop, disk, sphere d. hoop, sphere, disk e. hoop, disk, sphere 5. As a 2.0-kg block travels around a 0.50-m radius circle it has an angular speed of 12 rad/s. The circle is parallel to the xy plane and is centered on the z axis, 0.75 m from the origin. The magnitude of its angular momentum around the origin is: (Angular Momentum) a. 6.0 kg m 2 /s b. 9.0 m 2 /s c. 11 m 2 /s d. 14 m 2 /s e. 20 m 2 /s 6. A playground merry-go-round has a radius of 3.0 m and a rotational inertia of 600 kg m 2 . It is initially spinning at 0.80 rad/s when a 20-kg child crawls from the center to the rim. When the child reaches the rim the angular velocity of the merry-go-round is: (Conservation of Angular Momentum) Answers: 1-e 2-a 3-b 4-a 5-c 6-a
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