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习题练习:Rotational Equilibrium



 作者: admin发布日期: 2024-07-30 16:51   总分: 10分  得分: _____________

答题人: 匿名未登录  开始时间: 24年07月30日 16:19  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.41: For the diagram shown, wh a wyr5-uxwd528mr(vrat is the magnitude of the torque from the applied force as measured from the-vxrr58( wurm25d wya center of the disk?




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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  98.38: A uniform meter stick of mass 0.20 kg c2iwre9s doi;-2f f9 +xe vbz7is pivoted at the 40-cm mark. Where should one hang a masi7b z 9f x2;wsi2ecd9rfe+ -vos of 0.50 kg to balance the stick?

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.37: A uniform meter stick jc qki1;ctc5 29 qy2tihas a 45.0 g mass placed at the cm 20 mark as shown in the figure. If a pivot is placed at the 42.5cm mark and the meter st25k2 q1 j t;yiqiccc9tick remains horizontal in static equilibrium, what is the mass of the meter stick?


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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.16: Amass M1=40 kg is at the very edge of a 6.0mxjp5q ndo 25cbd8pb9 i.x)9 dg long plank which is pivoted about its center ofj g d8 )5 92.xoi9cdnxbqdppb5 mass located directly at the center of its length. How far from the center of the plank (x) should the mass kg M2=80 kg be placed so that the plank remains in static equilibrium in a horizontal position?



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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.20: A uniform 10.0 m long plank is pivoted about 1r5 du6djyk30aebtg, its center of gravity. A mass M1 then is placed at the left edge of the plank and a second mass M2 is placed 1.0 m from the right end. This system is in static equilibrium (shown). If each mass now is moved 2.0 m closer to the center of the plank, which one of the following choices best describes the subsequent motion o,yga t rd6kb50d1u3j ef the plank?



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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  12.34: A mass m attached to a light string of length L is located at an ang* lvbmca l(*b7 swanch 73+yr1le θ below the horizontal as shown in the figure to the right. The mass then is released from rest. Calculated from an axis perpendicular to the plane of the page through the pivot, which one of the following choices represents the s 1wlc+m7lv*ah*br73can b( y magnitude of the torque produced by the gravitational force acting on the mass at this instant?



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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.33: A uniform rectangular solid of side length Land width w sitjd2+yv +ts:a ( udh7ebs on a frictionless incline of variable angle θ . Assume that there is a very tiny peg preventing the box from sliding down the incline ad bey2+d (7usjv+ha t:t the point labeled P. At what angle of incline will the box begin to tip over?




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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.49: An inverted “V” in static equilibrium is made from two uniform beams eaci9vym 13 b 0j/u*ahtp4bob*s gh of mass M=12 kg. Each beam of the “V” has the same length and makes anuhvo 1 4gyb9btj i3a/ ps0b**m angle of $30^{\circ}$ with the vertical as shown in the diagram. Which one of the following choices best represents the magnitude of the static friction force acting on the left leg of the “V” from the level ground? The coefficient of static friction between each beam and the ground is $μ_s =0.76$.




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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.42: A long uniform rod, pivote- ai x8fe:j4lnur x dy,g2rj)3d at one end affixed to the ground, is in static equilibrium A horizontal rope acts 75% of the way up ther:rf4 32g , xjulanix)-yj8de rod while a vertical rope acts at the 0far end. The magnitude of each rope’s force is the same as the gravitational force acting on the rod. What is the value of the angle θ in the figure?


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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.43: A uniform beam connected to a wall at tkcjcb2a+ nkpg 54;;ss+ u p*d sdl5wp1he hinge is in static equilibrium as shown. Tpbjg5;* c+ pa25 ksdcwp4+snl sud1;k he cable connected to the beam is massless. What are the directions of the horizontal and vertical components of force acting at the pivot on the beam?



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