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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 show2 *a2a6vag ix6ub7orkn, what is the magnitude of the torque from the applied force as measured from the cento27g birua aax6* 26kver 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 mark. W.pely81 llni+xk )dd5here should one hang a mass of 0.50 kg to d5p1d ke). ll n+yx8libalance 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 stickq/mxqkd2 v s07 has a 45.0 g mass placed at the cm 20 mark as shown in the figure. Imx2qd/s kqv07 f 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 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 l;+v 4wstd,)t1 jkjv ftong plank which is pivoted about its centerd 4jvj; kt)f+ 1twtv,s 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. A2hf vgf7iu9 *c 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 follvi9 h*f fug2c7owing 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 ls 2wq8:e.sh ptg*l4tstring 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 foh gs:pt .l2wtqs4 el8*rce 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 rectanguu4k5to3ngjg + lar solid of side length Land width w sits on a frictionless incline of variable angle θ . Assume that there is a very tiny +4 juk5gto3gnpeg 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 “zea2q5(w (bd2y jnq3(nojt1iV” in static equilibrium is made from two uniform beams each of mass M=12 kg. Each beam of the “V” has tzw d2 5bo (q(a(2 nyni1qje3jthe 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 the ground, k:nhbj;4i7x p-k.4 1vo8hi 3bmnypk cis in static equilibrium A nm 84i-ihx; 3v k4bnpj.1:cok pkbyh7horizontal 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 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 t:vrr nqe 36zy )0osm oi(m/ .p+a;vacio a wall at the hinge is in static equilibrium as shown. The cable connected to the beam is massless.ir m ooas 60y;mcrv pve:na(q .+3i)/z What are the directions of the horizontal and vertical components of force acting at the pivot on the beam?



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