Moment of Inertia on a Merry-Go-Round
A father pushes a playground merry-go-round at its edge and perpendicular to its radius to achieve maximum torque.
Source
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"OpenStax College, College Physics. November 9, 2012."
http://cnx.org/content/m42179/latest/?collection=col11406/1.7
OpenStax CNX
CC BY 3.0.