Rotational basic parameter - 题库网 (tiku.one)

1#

05.11: A wheel of radius 0.1 m (wheel w*; corp u3sn:A) is attached by a non-stretching belt to ao sn:r*p;u 3cw wheel 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 three cars all moving countercays xjub8,c )cndn3./lockwise during as,c n jd8u./ycxn )3ba 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 thre mk 6s*tolq(g/e cars all moving counterclockwise during a oom6t g/*k(ls qne 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 moving7qgchp s4/fot2xol08 counterclockwise during a one lap race on an 2 o s8p/hxol047cfgtq 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 b7bxl/r jz3) px*b6bqd(e re)best represents the average angular speed of the hour hand on a standard clock (in units of rad/s rb/b3erqzxep*bb)()7l j xd6 )?

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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 racing5t- 1/q7r/v ,l(d 0aeh.ahwlfkg lxg e on a circular track one kilometer in circumference. The first car can circle the track ieeg-hda twl 1 hv l5/gafl(7r.0x,q/ kn 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(5) nmrtbx azxlhs(a44t h v,7 must be met in order to use the rotational kinematics x ahr7ht4l nvbs( 4(x,mta z)5 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 plays a record by spinning at a constant rate of 45 rev/min.k9-n lmygv8r5 ce.r rqn,s7a, What is thegnqe9nr .lm87sac , ,- y5rvrk 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 w+hh l t.4vvt875.0 cm makes 3.5 revolutions when coming to rest in 2.50 s. What was the inhlt+.8 wtvv4 hitial 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 j,3u9 2l5e:zr)dq vsw9f:no xjka/ u r(in rad/s) ,nz )qrfo:kd9e2 w jsruav:j/ 5u93lx?

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