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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 72+g3, aiy7qn qnkyb f/bltq: magnitude of the torque from the applied force as measurtlfn iqbbq/ n2 yk,3a7g+q7 :yed from 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 of mass 0.20 kg is pivoted at the 40-cm *0 gbp. s3.c swjy5nep mark. Where should one hang a mass of 0.50 kg to balance the stic *.p 50.ecbgj syp3wnsk?

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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 masokf-q o3 or6f(c2(dmps placed at the cm 20 mark as shown in the figure. If a pivot is placed at the 42.5cm mark and the meter stick remains horizontal in static equilibrium, what is the mass of the meter sticf3o((qd-rpf om 6ko2 ck?


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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 ib*m:k;qd8,fk ledu9 ms pivoted about its centbkdq e 9*ulm,m8k;: fder 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 grav 2lz(qm1p;*8wlx fsyk ity. A mass qx2mfk;sl(p1*l 8 zywM1 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 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 at an ano h-d1tomgj(f 2ic/i, y8/atm gle θ below the horizontal as shown in the figure to the right. The mass then is relyjh2df1to omm giiac8/ t(/ -,eased 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 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 sij bx1f22i) nalde 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 begin to tip 2i) bx1fanl2jover?




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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 ei2s 34w0ew bucach of mass M=12 kg. Each beam of the “V” has the same length and ma4 w iue0s2wcb3kes 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 aqr7ayhx :6y0z*+l7 dytrjg s+ ffixed to the ground, is in static equilibrium A horizontal rope acts 75% of 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 fi+ gt6s+y:jhq*dx7rz0 y7 ylr agure?


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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 toe fxvxtab/: ++;5vne egm m9y* a wall at the hinge is in static equilibrium as shown. The cable connected to the beam is me fgm+a :m; ve9yx5nvte/ *bx+assless. What are the directions of the horizontal and vertical components of force acting at the pivot on the beam?



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