Question
In: Physics
What happens when a spinning ice skater draws in her outstretched arms? (a) her angular momentum...
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What happens when a spinning ice skater draws in her outstretched arms? (a) her angular momentum decreases (b) her angular momentum increases (c) her rotational speed decreases (d) her rotational speed increases
Solutions
genius_generous answered 1 year agoRelated Solutions
[15 pts] A figure skater is spinning in place with her arms outstretched at an angular...
[15 pts] A figure skater is spinning in place with her arms
outstretched at an angular speed of 18.0 rad/s. She then raises her
arms straight up to increase her angular speed. Her body has a mass
of 58.0 kg and can be treated as a solid cylinder with a diameter
of 36.0 cm, while each arm has a mass of 3.5 kg and can be treated
as a thin rod of length 0.425 m when outstretched, and a hollow...
A: What is the angular momentum of a figure skater spinning at 3.4 rev/s with arms...
A:
What is the angular momentum of a figure skater spinning at
3.4 rev/s with arms in close to her body, assuming her to be a
uniform cylinder with a height of 1.4 m , a radius of 15 cm , and a
mass of 48 kg ?
**Express your answer using three significant figures and
include the appropriate units
B:
How much torque is required to slow her to a stop in 4.5 s ,
assuming she does not...
Conservation of Angular Momentum A female figure skater is spinning on ice. Assume that that the...
Conservation of Angular Momentum
A female figure skater is spinning on ice. Assume that that the
surface is basically frictionless. The skater is wearing weighted
bracelets as part of the costume for the performance. These
weighted bracelets weight .75 kg each. The skater has a spinning
routine in the middle of the performance and initially starts
spinning with arms stretched wide such that the weighted bracelets
are 1 m from the axis of rotation. She has an initial angular
velocity...
An ice skater has a moment of inertia of 5.0 kg•m2 when her arms are outstretched....
An ice skater has a moment of inertia of 5.0 kg•m2
when her arms are outstretched. If she pulls in her arms and
decreases her moment of inertia to 2.0 kg•m2, she will
be spinning at 7.5 rps. How fast is she spinning initially? Report
your answer in revolutions per second (rps).
A figure skater is spinning slowly with arms outstretched. He brings his arms in close to...
A figure skater is spinning slowly with arms outstretched. He
brings his arms in close to his body and his angular velocity
changes by a factor of 4. By what factor does his moment of inertia
change, and why?
A figure skater presses off the ice to begin spinning with her arms close to her...
A figure skater presses off the ice to begin spinning with her
arms close to her body. After completing 2 turns in 0.8 seconds she
moves her arms further away from her body, what will her new
angular velocity be?
a. <16.6 rad/s
B. 18 rad/s
C. 20 rad/s
D. 24 rad/s
Batsheva sits on a spinning stool with her arms folded. What happens to her angular velocity...
Batsheva sits on a spinning stool with her arms folded. What
happens to her angular velocity if she
does not move her body and the stool spins without friction
Eden and Ohad have the same mass. Eden sits at his desk in Rhode
Island and Ohad sits at his desk in
Ecuador (near the Equator). Who has more kinetic energy due to
Earth’s rotation, Eden or Ohad, or is
is the same
A space probe is launched from Earth and...
The outstretched hands and arms of a figure skater preparing for a spin can be considered...
The outstretched hands and arms of a figure skater preparing for
a spin can be considered a slender rod pivoting about an axis
through its center. When the skater's hands and arms are brought in
and wrapped around his body to execute the spin, the hands and arms
can be considered a thin-walled hollow cylinder. His hands and arms
have a combined mass of 7.5 kg. When outstretched, they span 1.8 m;
when wrapped, they form a cylinder of radius...
The outstretched hands and arms of a figure skater preparing for a spin can be considered...
The outstretched hands and arms of a figure skater preparing for
a spin can be considered a slender rod pivoting about an axis
through its center . When his hands and arms are brought in and
wrapped around his body to execute the spin, the hands and arms can
be considered a thin-walled hollow cylinder. His hands and arms
have a combined mass 8.0 kg. When outstretched, they span 1.7 m;
when wrapped, they form a cylinder of radius 24...
A zero-momentum spin stabilized satellite has a momentum wheel spinning at 5000 rpm. The angular momentum...
A zero-momentum spin stabilized satellite has a momentum wheel
spinning at 5000 rpm. The angular momentum of the wheel is 100
N-m-sec.
a) What is the spin rate of the satellite if its moment of
inertia is 500 kg-m2?
b) What is the moment of inertial of the wheel?
c) If there were a problem with the wheel and it was stopped,
what would be the spin rate of the satellite?
d) Assuming the problem was fixed, how long would...
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