The property of our eyes that makes us perceives a rotating coloured disc as white.
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The average angular speed of the grindstone is 10 rad/s
<em>Let's recall </em><em>Angular Speed</em><em> formula as follows:</em>
<em>where :</em>
<em>ω = final angular speed ( rad/s )</em>
<em>ω₀ = initial angular speed ( rad/s )</em>
<em>α = angular acceleration ( rad/s² )</em>
<em>t = elapsed time ( s )</em>
<em>θ = angular displacement ( rad )</em>
<u>Given:</u>
radius of the grindstone = R = 4.0 m
initial angular speed = ω₀ = 8.0 rad/s
final angular speed = ω = 12 rad/s
elapsed time = t = 4.0 seconds
<u>Asked:</u>
average angular speed = ?
<u>Solution:</u>
<em>Firstly , we will calculate </em><em>angular displacement </em><em>as follows:</em>
<em>Next , we could calculate the </em><em>average angular speed</em><em> as follows:</em>
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Grade: High School
Subject: Physics
Chapter: Rotational Dynamics
