A pulley of 8.0 cm radius, on a motor, is turning at 40 rev/s and slows down to 10 rev/s in 4.0 s. a) What is the angular acceleration of the motor? () b) What is the number of revolutions it makes in this time? c) What is length of the belt it winds in this time? 3)

A pulley of 8.0 cm radius, on a motor, is turning at 40 rev/s and slows down to 10 rev/s in 4.0 s. a) What is the angular acceleration of the motor? () b) What is the number of revolutions it makes in this time? c) What is length of the belt it winds in this time? 3)

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 46P: At its peak, a tornado is 60.0 m in diameter and carries 500 km/h winds. What is its 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 pulley of 8.0 cm radius, on a motor, is turning at 40 rev/s and slows down to 10
rev/s in 4.0 s.
a) What is the angular acceleration of the motor? )
b) What is the number of revolutions it makes in this time?
c) What is length of the belt it winds in this time? 3)

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