Physics of Everyday Phenomena
Physics of Everyday Phenomena
9th Edition
ISBN: 9781259894008
Author: W. Thomas Griffith, Juliet Brosing Professor
Publisher: McGraw-Hill Education
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Chapter 8, Problem 1CQ

Which units would not be appropriate for describing a rotational velocity: rad/min2, rev/s, rev/h, m/s? Explain.

Expert Solution & Answer
Check Mark
To determine

The units which are not be appropriate for describing a rotational velocity.

Answer to Problem 1CQ

rad/min2, rev/h are the units which are not appropriate for describing a rotational velocity.

Explanation of Solution

Given info: The four units are rad/min2,rev/s, rev/h, m/s.

Write the expression for the rotational displacement.

ω=Δθt

Here,

ω is the angular velocity

Δθ is the change in angular displacement

t is the time

The Rotational velocity is the rotational displacement divided by time.

It is the rate of change of rotational displacement.

rad/min is the commonly used unit of the rotational velocity.

The units rev/s and rev/h are the units that appropriate the rotational velocity.

rad/min2 is the unit of rotational acceleration and m/s is the unit of linear velocity.

Conclusion:

Therefore, rad/min2 and m/s are units which are not appropriate for describing a rotational velocity.

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Chapter 8 Solutions

Physics of Everyday Phenomena

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