Rotational basic parameter - 题库网 (tiku.one)

1#

05.11: A wheel of radius 0.1 m (wheel A) is attached b137a .zb )zbyth/o,i kaui+rwy 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 rotate thy ,1wb3a kiuzzi+r/oba ).t7hrough

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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 adi7mp5n *,.numk*xu ;3ecv zell moving counterclockwise durieuc,ukve5 xi. 3np dm zm;n7**ng 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 cars all moving counterclockwism;zw o.vs ut3:e during a :3m;uz s .wotvone 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 movinjb3uca6k83 4, :z +qoji jyqeag counterclockwise during a one lap:3 qy+ok a3qijbzea6u8,jj c4 race 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 followjcumyletv/n755 :ds;*r j zq/ing choices best represents the average angular speed of the hour hand on a stan:;juq *5tecz5 7yjmvnlr/ d /sdard 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 raym*o*bn),85py bp+x m wc gf,lcing on a circular track one kilometer in circumference. The first car can circle the track 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 racep,5fg*y*wmom nc8+b px, by)l 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 rotational k/2- y p k aswjlc*cfwgh92zp9,inematics equation s2/ c2 *f9kh ,lywcga9wp-pzj$\Delta\theta=w_0t+\frac{2}{1}αt^{2}$

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 spinning9/5/qoyd m7nbl5us * ,wee juc at a constant rate of 45 rev/min. What is the average angular acceleration of the record to reach this final angular speed, having star/n9bdq5cl/5ee j wu7 s*umyo, ted 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 to rest i-p bfzxn4heg2 3;kkfz,tmvzgr- 8/6 tn 2.50 s. What was th38zfh;4zg k-p ,m g2t6t bekv/rf- znxe initial 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 aver.qe:y.xd 9g ny jpkvs3:.- bylage angular speed of the secondhand on a clock (in rad/s)?vyd ye.y.ks:j.xb:lg pqn- 93

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