A cylinder of radius R = 6.0 cm is on a rough horizontal surface. The coefficient of kinetic friction between the cylinder and the surface is 0.30 and the rotational inertia for rotation about the axis is given by MR2/2, where M is its mass. Initially it is not rotating but its center of mass has a speed of 7.0 m/s. After 2.0 s the speed of its center of mass and its angular velocity about its center of mass, respectively, are:

A) 1.1 m/s, 0 B) 1.1 m/s, 19 rad/s C) 1.1 m/s, 98 rad/s D) 4.7 m/s, 78 rad/s E) 5.9 m/s, 98 rad/s A) 1.1 m/s, 0 B) 1.1 m/s, 19 rad/s C) 1.1 m/s, 98 rad/s D) 4.7 m/s, 78 rad/s E) 5.9 m/s, 98 rad/s

Exam 11: Rolling, Torque, and Angular Momentum

A uniform sphere of radius R rotates about a diameter with angular momentum of magnitude L. Under the action of internal forces the sphere collapses to a uniform sphere of radius R/2. The magnitude of its new angular momentum is:

(Multiple Choice)

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Question 61

A particle, held by a string whose other end is attached to a fixed point C, moves in a circle on a horizontal frictionless surface. If the string is cut, the angular momentum of the particle about the point C:

(Multiple Choice)

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Question 62

A man, with his arms at his sides, is spinning on a light frictionless turntable. When he extends his arms:

(Multiple Choice)

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Question 63

A cylinder of radius R = 6.0 cm is on a rough horizontal surface. The coefficient of kinetic friction between the cylinder and the surface is 0.30 and the rotational inertia for rotation about the axis is given by MR²/2, where M is its mass. Initially it is not rotating but its center of mass has a speed of 7.0 m/s. After 2.0 s the speed of its center of mass and its angular velocity about its center of mass, respectively, are:

(Multiple Choice)

4.9/5

(34)

Question 64

A 15-g paper clip is attached to the rim of a phonograph record with a diameter of 30 cm, spinning at 3.5 rad/s. The magnitude of its angular momentum is:

(Multiple Choice)

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(40)

Question 65

When a woman on a frictionless rotating turntable extends her arms out horizontally, her angular momentum:

(Multiple Choice)

4.8/5

(33)

Question 66

Showing 61 - 66 of 66

Exam 11: Rolling, Torque, and Angular Momentum

A uniform sphere of radius R rotates about a diameter with angular momentum of magnitude L. Under the action of internal forces the sphere collapses to a uniform sphere of radius R/2. The magnitude of its new angular momentum is:

A particle, held by a string whose other end is attached to a fixed point C, moves in a circle on a horizontal frictionless surface. If the string is cut, the angular momentum of the particle about the point C:

A man, with his arms at his sides, is spinning on a light frictionless turntable. When he extends his arms:

A 15-g paper clip is attached to the rim of a phonograph record with a diameter of 30 cm, spinning at 3.5 rad/s. The magnitude of its angular momentum is:

When a woman on a frictionless rotating turntable extends her arms out horizontally, her angular momentum:

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