Answered: FIGURE Q7.27

Science

Physics

FIGURE Q7.27

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter9: Energy In Nonisolated Systems

Section: Chapter Questions

Problem 13PQ

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Concept explainers

Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.

Question

A skater starts the jump moving forward as shown, leaps into the air, and turns one-and-a-half revolutions before landing. The typical skater is in the air for about 0.5 s, and the skater’s hands are located about 0.8 m from the rotation axis.

What is the approximate angular speed of the skater during the leap?
A. 2 rad/s B. 6 rad/s C. 9 rad/s D. 20 rad/s

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