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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: 游客未登录  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 thf,vv5 :ahs n+ae torque from the applied force as measured from the +a5hnv :sfa,vcenter 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 kg4glzlkvf4ur;,0cnd:8tsg ;k sia++ t is pivoted at the 40-cm mark. Where should one hang a mass of 0.50t g,08 4ztgassif+v4 ;rlnk l;d cku:+ 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 met/pnsrt a/y)(sg 2f b m2s0.mmser stick has 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 s 0ntmfas/)g2b.psmm 2ss(/ rytick 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 ppxpfwp f0i 9bp xos(c8:d ,3o;lank which is pivoted about its center of m pipw,p(fx:b;9 o3os0c 8dxfpass 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 its 0/:q(xw +t ;qjqhcnod jzh0z/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 mo zjd t/h:q +0onxc0qz/;jhq(w tion 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 locatea 52g3sqk,m ej qb2x)ad at an angle θ below the horizontal as shown in the figure to the right. The mass then is released from rest. Calculated from anasjb m 23e25 xakqg,q) 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 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 sivu0 )34jun r0xi/egcx de length Land width w sits on a frictionless incline of variable 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 begir/x ex3ugcv0)4iu j0nn 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 d,.c;b oqcyxt4 idv40beams each of mas 4t0c ,vd4c b.;iqodxys M=12 kg. 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 tmb5xa. 1ip5wist + +send affixed to the ground, is in static equilibrium A horizontal rope acts 75% of the way up the rod while a vertic1bwt55 tasm sxi+pi.+ al 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 theg f3 acvl2ljsc 08 cui-m6c(3y 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 acting at the pivo i3llgc cf 3cjuv-a0(8sy26c mt on the beam?



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