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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 magjx+kia0 f j;a3nitude of the torque from the applied force as measure;faj jax0+3ik d 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 pinq s2 1g(vckx8voted at the 40-cm mark. Where should one hang a mass of 0.50 kg to balance the stick?8vk(gqn x s2c1

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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 s v45h04y lhwmstick has a 45.0 g mass placed at the cm 20 mark as shown in the figure. If a pivot is placed at the 4h4 v0m5 wlyhs42.5cm 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 . jvy )xxj02vjthe very edge of a 6.0m long plank which is 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 mas2jx) vjjyx0. vs 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 j 64mu1ev) u;0 -rjerkvu1x hhis pivoted 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 subsequentej-ekh0r6 u1r4vxhjv u)u;1m 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 lengu2ha etpl (o l gg+;wc.gw,j)5th L is located at an angle θ below the horizontal as shown inowguce,2 .( +ajgpwl)hlgt5; 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 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 rectanguk7jd6a( cj- cj fh 8vg*5frt2rlar solid of side length Land width w sits on a frictionless incline of variable angle θ . Assume that there is a very tiny peg prevenajcr r6- 2h5jfkdgc78f( jv*t ting 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 equilibrium is made from two unifvgrdlx * tl1jp2859af,o jy 9form beams each of mass M=12 kg. Each beam of the “V” has the same length and makes an a25o1 ftxpdfg*l vj8ja,9y9lr ngle 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 uniformoo f9;jki6t 8kk :ew(n rod, pivoted at one end affixed 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 maeik:j8 n; (t6kk9woofgnitude 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 wa mb1-;bnbnwh, 5x eo)yll at the hinge is in static equilibrium as shown. The cable connected to the beam is massleso;,eb 51y b) xmb-wnhns. What are the directions of the horizontal and vertical components of force acting at the pivot on the beam?



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