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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, what is the magnitude of the torque frh0/ebif+y e;w3e g3z iom the applied force as measured fr zy3+ i/0b ;hgefi3eewom the 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 o34 +ka;vawd kd.kgo y7f-fx9cf mass 0.20 kg is pivoted at the 40-cm mark. Where should one hang a mass of 0.50 kg to balance the stic 3dcvwg a aofy9k+;-47dkxf.kk?

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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 hasyg3 p2s 0qsz(- rpyg ep8/l*wq a 45.0 g mass placed at the cm 20 mark as shown in the figure. If a pivot is placed at the 3gp28 pqgry(sy /ez-s wplq 0*42.5cm mark and the meter stick 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 6.0m long plank which isysmt tq:g 21,gyh5dlnho3y 1b/e,2ee pivoted about its center of mass located directly at the center of its length. How far from the center of the plank (x) sho:2 1q/,tn3etyb g d1ymylo2ghee,5shuld 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 i-j tu.*zg bpu0hkosa7 3gn)n+ s pivoted about 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 deg* bun)hj0p7 k tu-a 3zg.o+nsscribes the subsequent motion of 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 -.ge9i3qv8vqwnzji *at an angle 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 magnitude of the torque produced by thew *g .n v9v-38ieiqjzq 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 vg t4uo- bs (c92y3prhsits on a frictionless incline of v-svup4tyr2ho ( c3b 9gariable angle θ . Assume that there is a very tiny peg preventing the box from sliding down the incline at 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 equili r95okh01 tya,fg 1ivgbrium is made from two uniform beams each of mass M=12 ktf 1o,h g5grk91iy av0g. Each beam of the “V” has the same length and makes an 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, pivoted at one end affixed to t-ir0.uo o9:y scj z4ypfy5d,xhe ground, is in static equilibrium A horizontal rope acts 75% f.y04,j95p y d:cxzyirso o-uof the way up the 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 connectedv h62 1+v9;i1pz3d4od u0rwlil thh ja to a wall at the hinge is in static equilibrium as shown. The cable connected to the beam is massless. What are the directions of the horizontal and vertical components of force +r69t4pjlihod a vlzh3ud i;v2w01h1 acting at the pivot on the beam?



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