Question

A 45 kg figure skater is spinning on the toes of her skates at 0.50 rev/s...

A 45 kg figure skater is spinning on the toes of her skates at 0.50 rev/s . Her arms are outstretched as far as they will go. In this orientation, the skater can be modeled as a cylindrical torso (40 kg , 20 cm average diameter, 160 cm tall) plus two rod-like arms (2.5 kg each, 71 cm long) attached to the outside of the torso. The skater then raises her arms straight above her head, where she appears to be a 45 kg, 20-cm-diameter, 200-cm-tall cylinder

What is her new rotation frequency, in revolutions per second?

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

So, new rotation frequency is 3.21 rev/s

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
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?
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...
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?
  An ice skater is spinning at 6.6 rev/s and has a moment of inertia of 0.52...
  An ice skater is spinning at 6.6 rev/s and has a moment of inertia of 0.52 kg ⋅ m2. a.)  Calculate the angular momentum, in kilogram meters squared per second, of the ice skater spinning at 6.6 rev/s. b.)  He reduces his rate of rotation by extending his arms and increasing his moment of inertia. Find the value of his moment of inertia (in kilogram meters squared) if his rate of rotation decreases to 1.5 rev/s. c.) Suppose instead he keeps his...
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 60.0 kg skater is 1.60 m tall, has arms that are each 74.0 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...
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 73.0 kg skater is 1.60 m tall, has arms that are each 68.0 cm long (including the hands), and...
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 63.0 kg skater is 1.60 m tall, has arms that are each 64.0 cm long (including the hands), and a trunk that can...
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...
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 75.0 kg75.0 kg skater is 1.50 m1.50 m tall, has arms that are each 74.0 cm74.0 cm long (including the hands), and a...
On average, both arms and hands together account for 13 % of a person's mass, while...
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 70.0 cm long (including the hands), and...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT