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直角刚杆OAB在图示瞬时角速度ω=2rad/s,角加速度ε=5rad/s2,若OA=40cm,AB=30cm,则B点的速度大小、法向加速度的大小和切向加速度的大小为()。

单选题
2022-01-15 22:56
A、100cm/s;200cm/s<sup>2</sup>;250cm/s<sup>2</sup>
B、80cm/s;160cm/s<sup>2</sup>;200cm/s<sup>2</sup>
C、60cm/s;120cm/s<sup>2</sup>;150cm/s<sup>2</sup>
D、100cm/s;200cm/s<sup>2</sup>;200cm/s<sup>2</sup>
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正确答案
A

试题解析

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