Question

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 a trunk that can be modeled as being 34.0 cm in diameter. If the skater is initially spinning at 81.0 rpm with her arms outstretched, what will her angular velocity ω 2 be (in rpm ) after she pulls in her arms and they are at her sides parallel to her trunk? Assume that friction between the skater and the ice is negligible.

Answer #1

Hence, the requried angular velocity is, 161.53 rpm

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 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...

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...

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...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 3 minutes ago

asked 12 minutes ago

asked 12 minutes ago

asked 25 minutes ago

asked 29 minutes ago

asked 34 minutes ago

asked 56 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago