Rotational basic parameter - 题库网 (tiku.one)

1#

05.11: A wheel of radius 0.1 m (wheel A) is attac/9 t b vmb:o6dz)tb q62q2ozvuhed 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 revolutioz69z vtbtbm 2oq6q v)d:2uo/bn, 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 snapshot of three cars all moving counterclop.;h ckj;lpgsxr/ 2p1 ckwise during a one lap race on an elliptical scx /2p ljp 1;h.g;kprtrack.
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 baciuiw p 0j3ggq + zl84ra;mr4t o.67uelow is a snapshot of three cars all moving counterclockwise during a g7juz+ qartow.4;lir436ag upc0 im 8one lap race on 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 all moving countercloc vidg2,m2d,yc qga:.ve ih:g*kwise during a one lap race on ac,gieg*:y.d vmah:2 g ,iq2 vdn 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 repr,2:b c(6do)uig gtcej1bff3 p /fyd a4esents the average angular speed of the hour hand on a standard clock (in untf2:f/ce,g 4 a)ib6udof (cj gdpb31y its 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 kilometer inywmyvlbc5 o, :474t+xx/9cj id ydzbt-un/,f circumference. The first car can circle the track in 15 seconds at top speed while the second car can circle cw- ux/,dboc4jnlzy4/xb:t idyt5m+97 y, vfthe 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 the 5rq :82kb3dox87m-5h/ksc n vxxawrd rotational kinematnx2a dkx85v 7rdbs3 8k-wq:m/ r5cxh oics 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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8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

05.32: A turntable pz0aau8m)9p b.sw7 lji lays a record by spinning at a constant rate of 45 rev/min. What is the average angular acceleration of the record to reach this final angular spew7b a 0.9a)pu8l msjzied, 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 75.0 cm makes 3.5 revolutions when coming to9/*dai2pewx u(ij6q:ti mam . rest in 2.50 s. What was the initial . /iq9mw6em tpd aiui:xj2*a (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 average angular speed of the secondhand on a clock (in rad/s)j:+;rx ya.h)xgeck2yt5x7b j ?xya5k+jxyh;.7 e 2)cxgtr:bj

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