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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 th,dii/bnc b05 qe torque from the applied force as measured from the center of thb,q05 ndci/bi e 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.(.+ bs4 2 *rajunfm6wlgm sb3e20 kg is pivoted at the 40-cm mark. Where should one hang a mass of 0.50 kg to balance the stib b(g+ajrl e.m2swuf34mn *s6ck?

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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 has a 45.0 g mass placed at the cdz)9l1ep:mh z(4p8 .o q,g ; pizwvwpum 20 mark as shown in the figure. If a pivot is 8(epv h.p)lop p;u,zqzdg4iz1w:9 mwplaced at the 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 whicj8u 7 i6uwob*9e5b8g p v0drgzh is pivoted about its c0 98rb5ze6uibvjg7o dw8ugp* enter of 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 its center of gravity. A maxp vw qy.or*ew/d.0n0ss M1 then is p*d 0/r.qxwn0ywvo .e 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 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 ligmchw) 1yt2)f1u zbn az 9g3j8yht string of length L is located 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 the gravitational force acting on the mass at this instaw)19hczgz1an m f8b2u ty)j3ynt?



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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 rectanpusxd4( w(43sqddw7 ogular solid of side length Land width w sits on a frictionless incline of variable angle θ . Assume that there is a very tiny peg prev47 s s(xuwwdod(4dp q3enting 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 equ9fqa8 r,ane;2+js lbv *qdulg*8d2hoilibrium is made from two uniform beams each *9qo8e,dlnsa;u l jq8 gdha2b2*v+rf of mass 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 end affixed to t4ky,q- inqw/wbekf- 76j *z nghe ground, is in static equilibrium A horizontal rope acts 75% of the way up the rod while a vertical rope acts at the 0f6g4ziw- j q-e/wfk,qny*nbk7ar 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 the hini lt *ad13p3kz0vdp+age 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 pivot on the pi3*0zkd1 tldpaa+3 vbeam?



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