physics problem
Head: 7.0%
Arms: 13%(for both)
Trunk and legs: 80.0%
Suppose the mass of the dancer is 65.0kg , the diameter of her head is 16cm , the width of her body is 24cm , and the length of her arms is 60cm .
Calculate moment of inertia about dancer spin axis. Use the figures in the table 9.2 in the textbook to model reasonable approximations for the pertinent parts of yourbody.
Homework Answers
Human Rotational Energy
A dancer is spinning at 72 rpm about an axis through her center with her arms outstretched, as shown in the following figure. From biomedical measurements, the typicaldistribution of mass in a human body is as follows:Head: 7.0%Arms: 13%(for both)Trunk and legs: 80.0%Suppose the mass of the dancer is 56.5 kg, the diameter of her head is 16 cm, the width of her body is 24 cm, and the length of her arms is 60 cm.Calculate moment of inertia about...
A dancer is spinning at 72 rpm about an axis through her center with her arms...
A dancer is spinning at 72 rpm about an axis through her center with her arms outstretched, as shown in the following figure. From biomedical measurements, the typical distribution of mass in a human body is as follows: Head: 7.0% Arms: 13%(for both) Trunk and legs: 80.0% Suppose the mass of the dancer is 56.0 kg , the diameter of her head is 16 cm, the width of her body is 24 cm, and the length of her arms is...
Human Rotational Energy. A dancer is spinning at 72 rpm about an axis through her center...
Human Rotational Energy. A dancer is spinning at 72 rpm about an axis through her center with her arms outstretched, as shown in the following figure. From biomedical measurements, the typical distribution of mass in a human body is as follows: Head: 7.0% Arms: 13% (for both) Trunk and legs: 80.0% Suppose that mass of the dancer is 56.5 kg, the diameter of her head is 16 cm, the width of her body is 24 cm, and the length of...
On average, both arms and hands together account for 13%13% of a person's mass, while the...
On average, both arms and hands together account for 13%13% of a person's mass, while the head is 7.0%7.0% and the trunk and legs account for 80%.80%. We can model a spinning skater with her arms outstretched as a vertical cylinder (head, trunk, and legs) with two solid uniform rods (arms and hands) extended horizontally. Suppose a 70.0 kg70.0 kg skater is 1.70 m1.70 m tall, has arms that are each 64.0 cm64.0 cm long (including the hands), and a...
On average, both arms and hands together account for 13% of a person's mass, while the...
On average, both arms and hands together account for 13% of a person's mass, while the head is 7.0% and the trunk and legs account for 80%. We can model a spinning skater with her arms outstretched as a vertical cylinder (head, trunk, and legs) with two solid uniform rods (arms and hands) extended horizontally. Suppose a 70.0 kg skater is 1.80 m tall, has arms that are each 64.0 cm long (including the hands), and a trunk that can...
On average, both arms and hands together account for 13% of a person's mass, while the...
On average, both arms and hands together account for 13% of a person's mass, while the head is 7.0% and the trunk and legs account for 80%. We can model a spinning skater with her arms outstretched as a vertical cylinder (head, trunk, and legs) with two solid uniform rods (arms and hands) extended horizontally. Suppose a 69.0 kg skater is 1.70 m tall, has arms that are each 74.0 cm long (including the hands), and a trunk that can...
7. An ice skater can be modeled bv a cylinder of radius R and length L...
7. An ice skater can be modeled bv a cylinder of radius R and length L (trunk and legs together), 2 small thin cylinders. of radius r and length l (arms), and a sphere also of radius R (head). The head has mass mh, the trunk mt, and the arms ma. The ice skater rotates about her central axis. Find the moment of inertia of the ice skater with arms outstretched horizontally and then with arms vertical.
1. Three children are riding on the edge of a merry‑go‑round that has a mass of...
1. Three children are riding on the edge of a merry‑go‑round that has a mass of 105 kg and a radius of 1.80 m. The merry‑go‑round is spinning at 22.0 rpm. The children have masses of 22.0, 28.0, and 33.0 kg. If the 28.0 kg child moves to the center of the merry‑go‑round, what is the new angular velocity in revolutions per minute? Ignore friction, and assume that the merry‑go‑round can be treated as a solid disk and the children...
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 ( Ibar = 1 12 mℓ2 where ℓ is the length of the
bar ). When the skater's hands and arms are brought in and wrapped
around their body to execute the spin, the hands and arms can be
considered a thin-walled hollow cylinder. The hands and arms have a
combined mass 10 kg....
The outstretched hands and arms of a figure skater preparing for a spin can be considered a slender rod pivoting about a...
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 8.00kg . When outstretched, they span 1.80m ; when wrapped, they form a cylinder of radius...
Human Rotational Energy. A dancer is spinning at 72 rpm about an axis through her center with her arms outstretched, as shown in the following figure. From biomedical measurements, the typical distribution of mass in a human body is as follows: Head: 7.0% Arms: 13% (for both) Trunk and legs: 80.0% Suppose that mass of the dancer is 56.5 kg, the diameter of her head is 16 cm, the width of her body is 24 cm, and the length of...
On average, both arms and hands together account for 13% of a person's mass, while the head is 7.0% and the trunk and legs account for 80%. We can model a spinning skater with her arms outstretched as a vertical cylinder (head, trunk, and legs) with two solid uniform rods (arms and hands) extended horizontally. Suppose a 70.0 kg skater is 1.80 m tall, has arms that are each 64.0 cm long (including the hands), and a trunk that can...
7. An ice skater can be modeled bv a cylinder of radius R and length L (trunk and legs together), 2 small thin cylinders. of radius r and length l (arms), and a sphere also of radius R (head). The head has mass mh, the trunk mt, and the arms ma. The ice skater rotates about her central axis. Find the moment of inertia of the ice skater with arms outstretched horizontally and then with arms vertical.
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 ( Ibar = 1 12 mℓ2 where ℓ is the length of the
bar ). When the skater's hands and arms are brought in and wrapped
around their body to execute the spin, the hands and arms can be
considered a thin-walled hollow cylinder. The hands and arms have a
combined mass 10 kg....
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