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习题练习:Angular Momentum



 作者: admin发布日期: 2024-08-13 18:01   总分: 13分  得分: _____________

答题人: 匿名未登录  开始时间: 24年08月07日 16:02  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  
  13.47: Which one of the following choices best represents thj03* jbq2.hpfp;is 4n)h h+ uy+ogdpme magnitude of the angular momentum of the Earth (expre u0pj*2osndh h+bm;yj f 43qip.gh)+pssed in base MKS units) associated with its rotation about its axis?

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2#
 
多选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.37: Which one of the following72i8rq 5, hgnfwtfu+ mm2o4b qrq (z1z choices best approximates the magnitude of the Earth’s angular momentum (expressed in base MKS units) associated with its o i rmmf +bqzg ,h(q21uw47nzqot28f r5rbit around the Sun?

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.40: A 2.0 kg particle travels at a constant speed of 5.0 m/s alot46pugk,. mewyid6y.6 h b8bjng the line shgki8 , ..udbh6m6p6 4twjybeyown in the figure. What is the magnitude of the particle’s angular momentum calculated from the origin( unit: $kg.m^{2}/s$)?


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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.35: Mary rides her bicycle directed due South. She applies . d; a8vovz9-:jxl2cy welc2zthe brakes quickly bringing the bicycle to rest with the wheels rolling without slipping on the ground. Which one of the following choi w c;c.8z2:-a vevlzxjyol 92dces best represents the direction of the angular acceleration of the bicycle’s front wheel while it is slowing to rest from Mary’s point of view?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.41: Two uniform spheres of mass M have radsnb;:: yz lp91xpe knz m8mq)9ler0 7wii R and 2R. Each sphere is rotating about a fixed axis through a diameter. The rotational kinetic mml:7z n rle0b):xpk9pez yw98s;1 qnenergies of the spheres are identical. What is the ratio
of the magnitude of the angular momenta of these spheres? That is, $\frac{L_{2R}}{L_R}$=?

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.49: Two solid disks are made8 atj3mtbv1:8u ig.zk2w1vb d of the same material. One disk has radius R while the other disk has radius 2R. Both kgz b81m.w2ubvd: v3itjt18a disks are rotating about a fixed axis perpendicular to the disk, through its center. Given that the disks have equal kinetic energy, what is the ratio of the angular momentum of the disks $\frac{L_{2R}}{L_R}$

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.24: What condition must be met for: z 9bv*ubl8wh the angular momentum of a system to be conw:lbzh b v8*9ustant?

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.27: A spinning ice skater can increase his rate of rotation 6a8 iucm8t(0bj - s u2(rlzdzcby bringing his arms and free leg closer to his body. How does this procedure affect the skater's rotationalu2zcitms(cbu 0 az8(-rl8 jd 6 momentum and kinetic energy?

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.32: A figure skatergjz43j2ks 0 oxeo/d tzis.m03 has a moment of inertia of $5.0 kg.m{2}$with her arms outstretched. If she begins a spin at 2.0 rad/s with her arms outstretched and then brings her arms in tight to her body, her rate of spin increases to 8.0 rad/s in 3 seconds. Friction and wind resistance can be considered negligible.
What is the change in the skater's angular momentum as she brings her arms in tight to her body?

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  0.33: A figure skater has fcscu6s/i 8z m3ecf2c;mmu4:a moment of inertia of $5.0 kg.m^{2}$ with her arms outstretched. If she begins a spin at 2.0 rad/s with her arms outstretched and then brings her arms in tight to her body, her rate of spin increases to 8.0 rad/s in 3 seconds. Friction and wind resistance can be considered negligible.
What is the skater's angular acceleration as her arms are moved in during the three second interval?

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.23: An object m, on the end of a stringazn q*r- l:jxvx5 w6-j, moves in a circle on a horizontal frictionless table as shown. As the string is pulled very slowly through a small hole in the table, which of the following is correct for an observer measuring fr5njl-r aq*zx6:w- vxj om the hole in the table?


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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.40: A point particle of mass m collides with a thin rod pivoted at one e xpql8vz+j a ;xr*t2bij gi;nv6,(co 5nd. The rod has mass M=2m, length L , and moment of inerti;q( v gc 28jivz5x,i+olatxrjn*b;6 p a $I=\frac{1}{3}ML^{2}$ . The particle moveshorizontally with speed V when it hits the bottom of the rod and sticks to it. What is the speed of the particle immediately after collision?


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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.42: A uniform, solid disk with mass M and radius R is rotatixrxju4jl d4y9: t b8c4ng on a fixed, frictionless platform with constant angular speed ω0 about a fixed axis through its center. A second uniform solid disk of mass 2M and radius R/2 is placed from rest directly on top of the first disut yrb44 j49xd:xj8l ck so that the centers of the disks line up. When equilibrium is established, the disks are spinning at the same rate. What is the angular speed of the disks at equilibrium?


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