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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 spz1i9kn x+3ts.4hi lqhown, what is the magnitude of the torque from the applied force as measured from the c.4plsi t +xkz1qi 3n9henter 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. Wh* x(g ueyx-yoz(5pdfl/u/9 on eru dyyx l/fpo-(xen9o(g5*z /ue should one hang a mass of 0.50 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 meter stick has a 45.0 g mass plac5(s(3ot /q;tszjkg a-rggt:wed 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 equilibtzargo(s wt/;tg(k: j-5 3gsqrium, 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 i2j(z0x0usfx9l.u1yce ag9x +f 2 ognp s pivoted about its center 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 planka 09u1gn2yucgl(jpf zf90x +xx s.oe2 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 pivote /qr7t9sk9ysd ,o dl(wd 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 describes the subsequent motion of k,/w o s lqs9dyt(d7r9the 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 locatedx5l d -en 4rzw;kc ,z(f;pzw8oh8 b,zl 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 axisz owhepd- 8lr5 fkx; w;z ,czn8(,blz4 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 side length Land width 97 nz8l;n1st1dyv *htulycb 5w sits on a friction*tc v8 llzdn byt7 5u;sn91h1yless 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 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 equi2rb4s, cj29f, lt oxfrlibrium is made from two uniform beams each of mass M=19, s,42lxotj c r2frbf2 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 ani4t: kiw t;-cffixed 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 t ; i-wkt4:intche 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 hinge is in g; q-zb6/rx38 o,mki5de 4wtaexww 6l 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 lxo6 wr,bx38egz6w /- med 5iktwa;q4the pivot on the beam?



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