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【简答题】
飞轮作加速转动,轮缘上一点的运动学方程 。飞轮半径为2m,当该点的速率 v =30 m/s 时,法向加速度为__________ m/s 2 , 切向加速度为__________ m/s 2 。
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反馈参考答案：
举一反三
【单选题】Determine the upper limit of Ra for the surface marked with 2. (Single option: 10 points )
A.
3.2μm
B.
1.6μm
C.
25μm
D.
None
【单选题】Determine the roughness upper limit for the finest surface of the drawing. (Single option: 10 points)
A.
1.6μm
B.
3.2μm
C.
6.3μm
D.
None
【单选题】Determine the upper limit of Ra for the surface 1. (Single option: 10 points)
A.
6.3μm
B.
25μm
C.
12.5μm
D.
None
【单选题】Determine the upper limit of Ra for the surface marked with 1. (Single option: 10 points)
A.
1.6μm
B.
3.2μm
C.
25μm
D.
None
【单选题】Determine the upper limit of Ra for the surface 1. (Single option: 10 points)
A.
12.5μm
B.
25μm
C.
Uncertain
D.
None
【简答题】一对年轻夫妇带着他们4岁的儿子驾车来到服务站,对爱车(世嘉2.0 手动)进行1万5千公里的常规保养,如何进行客户接待?
【单选题】Determine the upper limit of Ra for the surface 1. (Single option: 10 points)
A.
25μm
B.
12.5μm
C.
6.3μm
D.
None
【单选题】On condition of infrequently disassembling and light load, determine the type of threaded fasteners used to fasten the upper part with through holes and the lower part with threaded holes. (Single opt...
A.
Stud joint
B.
Screw joint
C.
Bolt joint
D.
None
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