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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 magnitude of the torque from thea6oeg(m:; mje 8 rrsxo: +9dyd applied force as measured from the center of the a:yd98oe;gd+j( :rmo mxe6r s 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 mkpwz;gtvvvj;j1,c 4/ ass 0.20 kg is pivoted at the 40-cm mark. Wherz 1k4gjtpc/wj,vv;v ; e 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 z5p) if1;lyn4xkxye 5 g mass 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 fp)xyyl5ek41; x n z5iremains 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 qf *-l(f beaa4f9t 6apa5i aa-plank which is pivoted about its center of mass located directly at the center of its length. How far from the cit qa --( a9fa6paff5be4a l*aenter 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 centfiht+ul3k:d *r8i,+ xzrv3lw-alf n *er of gravity. A mass M1 then is placed at the left edge of the plank and a second mass M2 is placed 1.lnl*-3+ :fkwz,tx3au8d +hi*l if rr v0 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 locat p,lqr6ietn8-uht )1:4rhsf med at an angle θ below the horizontal as p):h ,f-et 46mrt nuqrhi81s lshown 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 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 recgq-) dts 53q*;qiwmnbazd17 m/ccq4k b0 :omrtangular solid of side length Land width w sits on a frictionless incline of variable angle θ . As)q*qbgta q z5k im o10d 43c;md-b nqrwms:c7/sume 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 equilibrium is made from two uniform be-5quhc-g2gpncn* :ez ams each of mass M=12 kg. Each beam of the “V” has the same length and makes an an25hz: cp--gge nq*c ungle 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 t6gbo+h )1obra; ieyp4;3 v aishe 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 gravitatieo3y)bsag o+hipvi 4; r16 b;aonal 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 iloe19t,dk*d* q /y+iecl3po t6d6 klgs in static equilibrium as shown. The cable connected to the beam is massless. What are the directions of the horiklecdoe/ot,pql 3 6tdg+*k6i9 yd* l1 zontal and vertical components of force acting at the pivot on the beam?



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