galyalvarez65
Answered

Welcome to Westonci.ca, the place where your questions find answers from a community of knowledgeable experts. Discover a wealth of knowledge from experts across different disciplines on our comprehensive Q&A platform. Discover in-depth answers to your questions from a wide network of professionals on our user-friendly Q&A platform.

A figure skater begins spinning counterclock-
wise at an angular speed of 4.6 7 rad/s. Dur-
ing a 4.2 s interval, she slowly pulls her arms
inward and finally spins at 7.3 7 rad/s.
What is her average angular acceleration
during this time interval?
Answer in units of rad/s.​

Sagot :

Answer:

Angular acceleration, [tex]\alpha =0.64\ rad/s^2[/tex]

Explanation:

Given that,

Initial angular velocity, [tex]\omega_i=4.67\ rad/s[/tex]

The final angular velocity, [tex]\omega_f=7.37\ rad/s[/tex]

Time, t = 4.2 s

We need to find her average angular acceleration  during this time interval. Acceleration is the rate of change of velocity. So,

[tex]\alpha =\dfrac{\omega_f-\omega_i}{t}\\\\\alpha =\dfrac{7.37-4.67}{4.2}\\\\\alpha =0.64\ rad/s^2[/tex]

So, her average angular acceleration is [tex]0.64\ rad/s^2[/tex].

We hope this information was helpful. Feel free to return anytime for more answers to your questions and concerns. We appreciate your time. Please come back anytime for the latest information and answers to your questions. Discover more at Westonci.ca. Return for the latest expert answers and updates on various topics.