Rotational basic parameter - 题库网 (tiku.one)

1#

05.11: A wheel of radius 0.1 m (wheel A) is attached by a/6lf qr,t.rowq a29q7tg0ibs 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, whe2 b6qw/siqr ,7tort9.gqal f0el 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 m4 bevvr j;b5-m:guh27 wu5w 6dkw s0hmoving counterclockwise duvde40gu6 7m m uw 5w:5hsjvw2br-hkb;ring 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 tw/+it g)hlyx6 m-gp ,m;5rjtrmaz-z5hree cars all moving counterclockwise during a one lap race on xgp5t5iy-a ,r;l6mrjtmh -zm w)z /g+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 counterclockwqaren3 yt . v,ysres+(s2s :*ziseqzr :t*v.syss2e a e3+ (sr,yn during a one lap 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 following chol c jzv +-v;iil2:: (mr1h3bdto6 -nc8wsyr blices best represents the average angular speed of the hour hand on a standard cloc: :-dn-imcyv t olhs6lwj8l+r1bcv3;zbi( 2 rk (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 racing on a circular track on4r 2swuzdayvz/rx)pcy -; */ ue 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 seconuvcx/ */pzwry4 azu ;-s2)r ydds 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 jc)on:au7u o7vopzv/v7 5uh5 rotational kinemato7zco5o /paj5uh7 7uvn vv): uics 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 r2(n p z0y9kf cjv1jg1oecord 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 answers are in units ongv0ok1f(jz 21j y pc9f 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 revolutiopmx.r(g ;t91* f0gc l3duyckfw /8r fkns when coming to rest in 2.50 s. What was19ruyffl8w; 0. tfxk/(3*km cdgr pg c the 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 average angular speed of the secondhand on a clmc )on3aoc vkih200 v:9qco n*ock (in rad/s)0q:n)ocvcc3vim k20an* 9 o oh?

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