Rotational basic parameter - 题库网 (tiku.one)

1#

05.11: A wheel of radius 0.1 m (wheel A) is attached by jjpl7coa2t ;mt sv 7-3a non-stretching belt to a wheel of radius 0.2 m (wheel B). The belt does n j 7sp;-vm 7t3jlc2oatot slip. If wheel B turns through 1 revolution, wheel A will rotate 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 snapst7z agw5)7kqr hot of three cars all moving counterclockwise during a one lap race )zgk rtqa7w75on 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*:+ iebeodqo2 cars all moving counterclockwise during a one lap race o*d i+e2:oobeq n an elliptical 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 almrg04c849 ipz8kb cxjl moving counterclockwise during a one lap ra8xm4 czcj08bk4 gi9prce on 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 repv+mamd: +ds+kmkn3z n (o l0st.g8/ddresents the average angular speed of the hour hand on a standard clock (in units of ran:ms mdkmlzkso+t8n d+v d 0ga( d.+3/d/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 kss, 9nazwh4e;ilometer in circumference. The first car can circle the track in 15 seconds at top speed while the sszash9e;n w ,4econd 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(4qxce9d .yu u3a7ypg in order to use the rotational kinematics equatio4qexgua .d 9y 3c7y(pun $\Delta\theta=w_0t+\frac{2}{1}αt^{2}$

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 co1 l/)* nv6zptsjbdy r,nstant rate of 45 rev/min. What is the 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 answersb psntly6 1)r,dz/j*v 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 wher, :t6g- zcdr:d,o pvmn coming to rest in 2.50 s. What was the initial angular speed of the vorcp:,mrd,:-zt6g d 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 secondhe lpwe;d3s74m 40hwkjmfii+2 and on a clock (in rad/s)sm w e7dmi43hiw0fe;l 4kp+2j?

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