A 3.45-kg centrifuge takes 122 s to spin up from rest to its final angular speed with constant a point located 18.5 cm from the axis of rotation of the centrifuge moves with a speed of 139.7 m at full speed. What is the angular acceleration (in rad/s2) of the centrifuge as it spins up? Answer:

A 3.45-kg centrifuge takes 122 s to spin up from rest to its final angular speed with constant a point located 18.5 cm from the axis of rotation of the centrifuge moves with a speed of 139.7 m at full speed. What is the angular acceleration (in rad/s2) of the centrifuge as it spins up? Answer:

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter10: Fixed-axis Rotation

Section: Chapter Questions

Problem 48P: An ultracentrifuge accelerates from to 100,000 rpm in 2.00 min. (a) What is the average angular...

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Concept explainers

Angular speed, acceleration and displacement

Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.

Angular Position

Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.

Question

A 3.45-kg centrifuge takes 122 s to spin up from rest to its final angular speed with constant angular acceleration. A
point located 18.5 cm from the axis of rotation of the centrifuge moves with a speed of 139.7 m/s when the centrifuge is
at full speed. What is the angular acceleration (in rad/s2) of the centrifuge as it spins up?
Answer:

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