Some dragonflies splash down ontothe surface of a lake to clean themselves. After this dunking, thedragonflies gain altitude, and then spin rapidly at about 1000 rpmto spray the water off their bodies. When the dragonflies do this“spin-dry,” they tuck themselves into a “ball” with a moment ofinertia of 2.6 * 10-7kg·m2. How much energy must the dragonflygenerate to spin itself at this rate?
Some dragonflies splash down ontothe surface of a lake to clean themselves. After this dunking, thedragonflies gain altitude, and then spin rapidly at about 1000 rpmto spray the water off their bodies. When the dragonflies do this“spin-dry,” they tuck themselves into a “ball” with a moment ofinertia of 2.6 * 10-7kg·m2. How much energy must the dragonflygenerate to spin itself at this rate?
Glencoe Physics: Principles and Problems, Student Edition
1st Edition
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Paul W. Zitzewitz
Chapter9: Momentum And Its Conservation
Section: Chapter Questions
Problem 1STP
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Question
Some dragonflies splash down onto
the surface of a lake to clean themselves. After this dunking, the
dragonflies gain altitude, and then spin rapidly at about 1000 rpm
to spray the water off their bodies. When the dragonflies do this
“spin-dry,” they tuck themselves into a “ball” with a moment of
inertia of 2.6 * 10-7
kg·m2
. How much energy must the dragonfly
generate to spin itself at this rate?
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