Question

A 55.0-kg woman stands at the rim of a horizontal turntable having a moment of inertia of 420 kg · m2 and a radius of 2.00 m. The turntable is initially at rest and is free to rotate about a frictionless vertical axle through its center. The woman then starts walking around the rim clockwise (as viewed from above the system) at a constant speed of 1.50 m/s relative to the Earth. (a) In what direction does the turntable rotate? counterclockwise clockwise With what angular speed does the turntable rotate? rad/s (b) How much work does the woman do to set herself and the turntable into motion? J

Answer #1

A 65.0-kg woman stands at the rim of a horizontal turntable
having a moment of inertia of 460 kg · m2 and a radius of 2.00 m.
The turntable is initially at rest and is free to rotate about a
frictionless vertical axle through its center. The woman then
starts walking around the rim clockwise (as viewed from above the
system) at a constant speed of 1.50 m/s relative to the Earth.
(a) In what direction does the turntable rotate?...

A 50 kg woman stands at the rim of a horizontal turntable having
a moment of inertia of 560 kg·m2 and a radius of 2.0 m.
The turntable is initially at rest and is free to rotate about a
frictionless vertical axle through its center. The woman then
starts walking around the rim clockwise (as viewed from above the
system) at a constant speed of 1.5 m/s relative to the Earth.
(a) In what direction and with what angular speed...

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a. He
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A turntable has a moment of inertia of 3.00 × 10−2 kg · m2 and
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By what factor does the kinetic energy of the system change
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TO.
0.91
B.
1.00
C.
0.83
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A Texas cockroach of mass 0.108 kg runs counterclockwise around
the rim of a lazy Susan (a circular disk mounted on a vertical
axle) that has a radius 12.4 cm, rotational inertia 4.19 x
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cockroach's speed (relative to the ground) is 2.81 m/s, and the
lazy Susan turns clockwise with angular velocity ω0 =
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A Texas cockroach of mass 0.100 kg runs counterclockwise around
the rim of a lazy Susan (a circular disk mounted on a vertical
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A turntable has moment of inertia 1 kg m2 and rotates
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A uniform cylindrical turntable of radius 2.00 m and mass 31.2
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1. Find the final angular speed of the clay...

A heavy turntable, used for rotating large objects, is a solid
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(a)
What is the moment of inertia of the wheel (in kg ·
m2)?
_____ kg · m2
(b)
What is the mass (in kg) of the...

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