gc textbook chapter 8 Rotational Motion (id: 03314112b)

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本题目来源于试卷: gc textbook chapter 8 Rotational Motion，类别为 unclassified

[问答题]
Suppose a disk rotates at co2z ftmkrhoe 3m756v/ +w+rnvbnsta7ar 9t e;cbpj tsut96;nt angular velocity. Does a point on the rim have radial and/or tangential at7rtj; t6 ;9ebsupc9 acceleration? If the disk’s angular velocity increases uniformly, does the point have radial and/or tangential acceleration? For which cases would the magnitude of either component of linear acceleration change?

参考答案:
If a disk rotates at constant angular velocity, a point on the rim has radial acceleration only – no tangential acceleration.  If the disk’s angular velocity increases uniformly, the point will have both radial and tangential acceleration.  If the disk rotates at constant angular velocity, neither component of linear acceleration is changing – both radial and tangential acceleration are constant.  If the disk rotates with a uniformly increasing angular velocity, then the radial acceleration is changing, but the tangential acceleration is a constant non-zero value.


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