本题目来源于试卷: Rotational Motion，类别为 IB物理学
[问答题]
The angular velocity of a,g1aq8voepnr 9sg 8/k wheel rotating on a horizontal axlexr. .q(smb1uy r1 id-m points west. In what direction is the linear velocity of a point on the top of the wheel? If the angular acceleration points east, describe the tangential linear acc 1.iu rqm bxm(-sdy.1releration of this point at the top of the wheel. Is the angular speed increasing or decreasing?
参考答案: See the diagram. To the left is west, the direction of the angular velocity. The direction of the linear velocity of a point on the top of the wheel would be into the paper, which is north. If the angular acceleration is east, which is opposite the angular velocity, the wheel is slowing down – its angular speed is decreasing. The tangential linear acceleration of the point on top will be in the opposite direction to its linear velocity – it will point south.
本题详细解析:
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