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-s*hr w kbn x4bf):3n5oftretching belt to a wheel of radius 0.2 m (wheel B). The belt doeh4knrnb:3fbfw)5 x* o s 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 snapshek5l ive* w:r6wdxq.** .n ifzot of three cars all moving counterclockwise during a one lap race on an elliptical tracke rl5w6i*dwnkf xqiv: e* z..*.
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 cat+p*t*vw che/yi r3a fr+f-ti; nbyh055tlo:rs all moving counterclockwise during a one lap race on an elliptical track. l*ya*rhypf+:t0cibhirt- w;+/3 o5 vtn t5fe
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 counte 1u6pipgysw39 gh ;nwvg- nu+.rclockwise during a one lap nspnwvw-+u3 gg61yg;h.i up 9race 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 choices best represents the am2*jlsp1 kgh3v6 yb 1esb zp39verage angular speed of the hour *sys1 l b36ke 2bpjzh3gmp19vhand on a standard 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 ;nehmn*/8d fg racing 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 c*edfnn;8m/ hgircle 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 must be met l c32zc cbdq-:-eqn5o . rnhh(in order to use the rotational kinematicn:- zd.nl-bhr cq5eoq(h2 cc 3s 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 ( k, ld 5blk200juuts ca,a0*h6gx tos45 rev/min. What is the average angular acceleration of the record to reach this 50ssg(k0au2bac0t 6ll,duotj*kx h ,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 757tri7vf la ji0k z);j3.0 cm makes 3.5 revolutions when coming to rest in 2.50 s. What was the initl i)jk0;7 7jt3r zfivaial 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 chz8b1 gw) xk h8ht(bu8lock (in rad/s)?h (8b8hug1 )zthbw8kx

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