Rotational basic parameter - 无忧得胜-网上国际课程 (5edu.win)

?作业考试练习?美国物理杯赛(Physics Bowl)?Rotational basic parameter

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习题练习：Rotational basic parameter

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作者: admin 发布日期: 2024-08-13 17:43 总分: 10分得分: _____________

答题人: 游客未登录开始时间: 24年08月07日 16:00 切换到: 整卷模式

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05.11: A wheel of radius wiv/h2k4kq-g /zfwc* 0.1 m (wheel A) is attached by a non-stretching belt to a wheel of radius 0.2 m (wheel B). The belt does //qkg4 h 2k*-wwizvc fnot slip. If wheel B turns through 1 revolution, wheel A will rotate through

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03.01: The diagram below is a snapshot of thregaj/+f o*f-kv1+msyl 27qq/ r :*ioeuw vqs(be cars all moving counterclockwise during a one lap race on an elliptical tracg/fj2r 1e7*fvo*q -yws:iq/l k ua+ms+vqbo(k.
Which car has had the lowest average speed during the race so far?

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03.02: The diagram below is a snapshot of three cars all moving counterclockuok *5ef:lx5- r a1fxnwise during a one lap race on an elliptical tracn1xue5 *a x-5:rfofklk.
Which car at the moment of the snapshot MUST have a net force acting on it?

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03.03: The diagram below is a snapshotgg+)wbs 72zvj0 r:ond of three cars all moving counterclockwise during a one lap race on an elliptica) 7sg:vgn+w2o bz jdr0l 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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12.25: Which one of the following choices best 9t. q mg86ewne pz+bzok7dl+/h .thg/represents the average angular speed 9kn t dw++t6b.mhl /qg ohg7./p8ezzeof the hour hand on a standard clock (in units of rad/s)?

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00.40: Suppose two cars are racing on a circular track one kilometez9t ipu+c2 m5dr 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 starting the last lap tpd 25cu+i m9zof the race not to lose?

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09.16: What condition must be met in order to use o yj),wr(nb2g sk)b1om,q ;a6:4yi qlzhhs3z the rotational kinematqjs4 aml 2qoyz1rn,byg )h:h)( biok; w z6s,3ics equation $\Delta\theta=w_0t+\frac{2}{1}αt^{2}$

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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05.32: A turntable plays a rexy1k g+ 4k 39z7pzmpkecord by spinning at a constant rate of 45 rev/min. What is the average angular acceleration of the record to reach this final angular speed, having started from r7z9g+zkp4ykm e3pxk 1 est, if it takes 8 seconds to do so? All answers are in units of rad/s2.

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17.18: A disk of radius 75.0 cm makes 3.5 revolutions when coming to rest in 2.5cd ):d bekoqd63s ;kg496skw g0 s. What was the initial angular speed of the disog4)6de;c ds qg63kw:k9 bd ksk?