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 (Figure 1). 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 thin-walled...
When a figure skater goes into spin she will begin with her arms
extended, and then...
When a figure skater goes into spin she will begin with her arms
extended, and then draws her arms inward. As a result the ice
skater spins faster. Describe why this works in terms of angular
momentum.
Provide your own example of the conservation of linear momentum
in a collision. Use the words elastic, inelastic, and totally
inelastic in your explanation.
What is the angular momentum of a figure skater spinning at 2.3
rev/s with arms in...
What is the angular momentum of a figure skater spinning at 2.3
rev/s with arms in close to her body, assuming her to be a uniform
cylinder with a height of 1.5 m, a radius of 16 cm , and a mass of
49 kg ?
How much torque(in magnitude) is required to slow her to a stop
in 4.8 s , assuming she does not move her arms?
a. What is the angular momentum of a figure skater spinning at
2.0 rev/s with arms...
a. What is the angular momentum of a figure skater spinning at
2.0 rev/s with arms in close to her body, assuming her to be a
uniform cylinder with a height of 1 m, a radius of 0.2 m, and a
mass of 50 kg?
b. How much torque is required to slow her to a stop in 5.0 s,
assuming she does not move her arms?
Diana, a figure skater, is initially spinning at an angular
speed 2.50 rev/s, with her arms...
Diana, a figure skater, is initially spinning at an angular
speed 2.50 rev/s, with her arms and legs inward. Assume that she is
a uniform cylinder with a height of 1.4 m, a radius of 18 cm, and a
mass of 55 kg. Assume no external torques act.
a) What is her moment of inertia?
b) If she extends her arms outward, what is her new moment of
inertia? Assume that
her armspan is 1.3 m and her arms are...
1)A 1.0 kg mass is located at (2.3, 0, -7.9) m and moving at (0,
5.7,...
1)A 1.0 kg mass is located at (2.3, 0, -7.9) m and moving at (0,
5.7, 3.9) m/s. What is the angular momentum of this mass about the
origin?
A.
(-3.0, 0.0, -76)
B.
(13, -9.0, 45)
C.
(45, -9.0, 44)
D.
(45, -9.0, 13)
E.
(-76, 0.0, -3.0)
F.
(0.0, 0.0, 0.0)
G.
(-13, 9.0, -45)
H.
(-45, 9.0, -13)
I.
(76, 0.0, 3.0)
J.
(-45, 9.0, -44)
K.
(-44, 9.0, -45)
L.
(44, -9.0, 45)
M.
(3.0, 0.0,...
A skateboarder with his board can be modeled as a particle of
mass 79.0 kg, located...
A skateboarder with his board can be modeled as a particle of
mass 79.0 kg, located at his center of mass, 0.500 m above the
ground. As shown below, the skateboarder starts from rest in a
crouching position at one lip of a half-pipe (point circled A). The
half-pipe forms one half of a cylinder of radius 6.20 m with its
axis horizontal. On his descent, the skateboarder moves without
friction and maintains his crouch so that his center of...