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Date: 15-9-2020
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Date: 22-11-2020
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Date: 1-1-2017
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Kinetic Energy of Rotation
To calculate the kinetic energy of a rotating object we add up all of the kinetic energies of the individual particles making up the object, namely
The speeds are . Note we do not write because the rotational velocity of all particles is the same value . That is 1 = 2 = 3 =…..≡. Substituting gives
Define rotational inertia or rotational mass as
and we get
which looks exactly like where instead of velocity v we have and instead of mass (or inertia) m we have rotational mass (or rotational inertia) I. Recall that mass, or inertia, tells us how difficult it is to move an object. Similarly the rotational mass, or rotational inertia, tells us how difficult it is to rotate an object.
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الصحة العالمية: شركات التبغ تستهدف جيلا جديدا بهذه الحيل
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بكل عزيمة ونشاط.. كيف يمكن للطلبة مواجهة الامتحانات؟
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بمشاركة 60 دولة جامعة الكفيل تمثل العراق بمونديال مناظرات الجامعات في قطر
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