?? ? ????????????????? Angular Acceleration?External Torque and Moment of Inertia

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?? ??????????????????Angular
Acceleration?External Torque and Moment of
Inertia
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????(object)
?? ???? (angular acceleration, a ),
???? (external torque, t ) , ????
(moment of inertia, I ) ??????
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????(theory)
??? (rigid body) ???? (axis of rotation)
???,????????????,????????????????????,????????????
???? I
??????t tIa, a ????
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????? i,???????????????????
???????????? ri
??????(t rF sinf rFt),?????
????????????
??????????????
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???????????
(??????,??????)
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??????????????????? ????????????????????, ????????
???????????,?????????????,
??????t????
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???? q , ???? t , ??? r
?
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(?) ??????t ?????a ????
?
(?) ??????a ?????t ????
?
(?) ??????????????????