Rotational basic parameter - 题库网 (tiku.one)

1#

05.11: A wheel of radius 0.1 m (wheel A) is attached by a non-nnj73dyhg7 q0stretching belt to a wheh73 7gn0j ndqyel of radius 0.2 m (wheel B). The belt does not 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 snapshot of thr8d2d-y)j bkjp ee cars all moving counterclockwise during a one lap race on an elliptical tk) pj8y2dbd -jrack.
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 moving countercbk77.zjy 1w1m rg7o+b mnuad-gn as43lockwise during a one lap race on an elli7us 4 b1go+ mj1bwdayaz 7.n-7nrk3gmptical 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 bwdevx)ej1/ ,a snapshot of three cars all moving counterclockwise during a one lap race on an elliptical track./jvd ex),eb1 w
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 the ave3b *r*v8kij ibrage angular speed of the hour hand on a standard clock (in uni 8 *bk*r3ibvjits 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 in cwd(*y )hr+fu)t xtsr ;ircumference. The first car can circle the track in 15 seconds at top speed while the second car can circle the tr*y;t stw)) u+fdxr h(rack 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 :f9mdx)2tk5c 7hliu 5tym tl4 in order to use the rotational kinematics lh4k)m f:tt2mt7y5 x lucid95equation $\Delta\theta=w_0t+\frac{2}{1}αt^{2}$

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 y9qcd//sz:m9qr g jka)l7qs 9record 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 rest, if it takes 8 seconds to do so? All anq7 m jg/lzcrqk/ 9 qa9:s)dys9swers 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 comingn7dn3 yp/l:e c to rest in 2.50 s. What was the initial angular l:d n3/7yecnp 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 secoddz(b3orr(g 45kg o l3 h ps0h8ybse 0pq1p2-zndhand on a clock (in rad/s)?ygp2dk08oblsphp r 0 (3g4reqd zzbs5 h3(1o-

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