Rotational basic parameter - 题库网 (tiku.one)

1#

05.11: A wheel of radius 0.1 m (wheel A) is attached by a n+ zf 3c*u ,fgjl r8l0l47(ylapx bb.fion-stretching belt to a wheel of radius 0.2 m (wheel B).l , y lul*rb0fxg4ibz(cfp7j.f l+8a 3 The belt does not slip. If wheel B turns through 1 revolution, wheel A will rotate through

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2#

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03.01: The diagram below is a snapshot of three cars all moving counterclockwis,fkkoqc3akm.p b4p qg4t8; ffl c2a60e during a one lap race on an ellipp 24.f8okafcbc q6 g 30;ak4qmktpf ,ltical track.
Which car has had the lowest average speed during the race so far?

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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

03.02: The diagram below is a snapshot of three cars all movinger:/:xfo io1xw8mtql ep5 w, / counterclockwise during a one lap race on an elliptie pw,: f8imxlw t/rooqx5/:1e cal track.
Which car at the moment of the snapshot MUST have a net force acting on it?

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

03.03: The diagram below is a snapshot of three cars all moving counterq* 90kq4s*qymkkshh ;98(a :ksfzdwkclockwise during a one lap race on 0h4q*ks(dky9a;:wh9fk sk*m ks 8qqz an elliptical track.
Which car can finish the race without changing its present momentum?

A. carA

B. car B

C. car C

D. none of the three cars can finish the race with its present momentum

E. cannot be determined with information provided

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5#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

12.25: Which one of the following choices best represents thegl ehd:k(1le q ;lhauv9- oa3/ average angular speed of the hour hand on a ua13 v-ko/;agedhlh(lqle : 9 standard clock (in units of rad/s)?

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6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

00.40: Suppose two cars are racing on a circular trp86*( ;d1lsm ne h6nys ggjkv.ack one kilometer in circumference. The first car can circle the track in 15 seconds at top speed while the second car can circle the track in 12 seconds at top speed. How much lead does the first car need s16dnk8ylj *hg6gmne; s v.sp(tarting the last lap of the race not to lose?

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7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

09.16: What condition must be met in order to use the rotational ki3k1tvuif dxci3 . z),snematics e . dfvckzsu1)3txi, 3iquation $\Delta\theta=w_0t+\frac{2}{1}αt^{2}$

A. The angular acceleration is constant.

B. The angular velocity is constant.

C. The linear acceleration is zero.

D. The angular acceleration is zero.

E. There is no restriction on the use of this equation.

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8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

05.32: A turntable plays a record by spinning at a constant ratm()-j) qff +yrbc )efve of 45 rev/min. What is the average angular acceleration of the record to reach this final angular speed, having started from res (-by+)qre cf)v)mffjt, if it takes 8 seconds to do so? All answers are in units of rad/s2.

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9#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

17.18: A disk of radius 75.0 cm makes 3.5 revolutions when cd,lxd,:dh y /*jwkxb0oming to rest in 2.50 s. What was the initial angular sp,lddhy*w x , /0:kbxjdeed of the disk?

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10#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

08.12: What is the average angular speed of the sel w,l ibp*9+tyrfts92condhand on a clock (in rad/s)?bpt+w,9lif2 tys r*l9

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