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 consk4 *p(, ne8kyafgyi0 btant angular vfzt h1l7,,ymjqv3le oca +a*( elocity. Does a point on the rim have radial and/or tangential 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 *a,t, j 7ocaqyv+z(h fel1m3 lcomponent 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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