Rotational basic parameter - 题库网 (tiku.one)

1#

05.11: A wheel of radius 0.1 m (wheel A) is attache7sqn38 +jh irvd by a non-stretching belt to a wheel of radius 0.2 m (wheel B). The belt does not slip. If wheel B turns through 1 revolution, wheel A will rotatqrv8n + s3ih7je through

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

03.01: The diagram below is a snapshot of three cars all movindjq- mombkr:ly9+3j y*uu+a)xrm;g 1g counterclockwise during+ 1uaqg)ok mm yx:j;- 3br+j 9ym*dlur a one lap race on an elliptical 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 k /2vt xbw-c.ny k(;ud1h to9jcars all moving counterclockwise during a one lap race on an elliptica.kvcon/kh(12w;u b -x jtyt9dl 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 threj) lmw11y kd/ uk n:(o2dn,hdye cars all moving counterclockwise during a one lap race on an 2hk ,d j/nkd1noml:dwy)1y (u 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 best1 3zhf2v ojop+ represents the average angular speed of +3hfoz1vjo p2the hour hand on a 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 track one kildds;:w 7rr hf1e n;qpw2i)k)iometer in circumference. The first car can circle the t 7;qprw dk reds:) 1hf;i)ni2wrack 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 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 t87s ;p 7r8npntkqy;dka9o/z i he rotational kinematics an8kr 7o;/7 9nqiz k;dypt8spequation $\Delta\theta=w_0t+\frac{2}{1}αt^{2}$

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 spinnt m4s) er:yzk1ing at a constant rate of 45 rev/min. What is theyz smt :k4r1e) average angular acceleration of the record to reach this final angular speed, having started from rest, 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 75ne1rp a*w*yp-e/*xc c.0 cm makes 3.5 revolutions when coming to rest in 2.50 s. What was the ini/*e*ccw-pnae x r1y*ptial angular speed 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 avea4 k9m )g+5g te7q+epeaax1scrage angular speed of the secondhand on a clock (in rad/s)g+1aak9m7gp se ax4eecqt +) 5?

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