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习题练习:Centre of mass system



 作者: admin发布日期: 2024-08-07 17:28   总分: 5分  得分: _____________

答题人: 匿名未登录  开始时间: 24年08月07日 15:56  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  
  06.10: A firecracker explodes while in flight along a parabolic path and fr bkk/6.bh )uri-szm-eagments from it traveling all directions. After the explosion, the center of mass of the firecra-uh.m) b-ikbezsk /r6 cker

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.20: A large wedge resqxm g3jmb6o 80tmgr0,ts on a horizontal frictionless surface, as shown. A block starts from rest and slides down the inclined surface of the wedgeb xor,tq0m0mg 8jgm 63, which is rough. During the motion of the block, the center of mass of the block and wedge system


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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.34: A 4.0 kg object in deep space moves at a constant velocity osq rm t1l z01l/,ln3bmf 10 m/s along the +x axis. The object suddenly explodes into 2 equal mass pieces. Immediately after the explosion, one piece is now moving directly along the –y axis with a speed of 8.0m/s. What was the size of the impulse (in proper MKS units) provided to this piece now moving along the –y axis from tlm/mllq0 1zts1 n, r3bhe explosion?




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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.26: A 10.0 kg mass moves to the right at 8.00 m/s:po*yyg1y 73 g/c u+i eh.ptso. A 5.0 kg mass moves to the left at 7.00 m/s. With what speed does o/ih.*3yuo+pcg7 gyt pys1e:the center of mass of this two-mass system move?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.34: A 9.20 m long unifavdu n0eq 2+c6orm plank rests on a frictionless ice pond. A 52 kg box rests on the plank’s left end while a 71 kg person stands at the plank’s right end. Aftnav u+0qc d26eer the person walks to the left on the plank and stands at the same location as the box, the plank has slid 3.84 m to the right relative to the pond’s shore. Which one of the following choices best represents the mass of the plank?



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