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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: 游客未登录  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 frag dv+ gn /jc;u*dr2-uzkments from it traveling all directions. After the explosion, the center of mass of the k;u *-duzg/vrjn+2cdfirecracker

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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 rests on a horizontalct5 ph 3lmg*tbd;(yq -su80g2ssd+rz frictionless surface, as shown. A block starts from rest su d8(+5t 2-slb0;mstgyz* hd r qgcp3and slides down the inclined surface of the wedge, 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 objegh9ved3+vvbl. 4lo 09ow vgq* ct in deep space moves at a constant velocity of 10 m/s along the +x axis. The object sud4 g093lbwh+dgo *.vvoevlq v9denly 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 the 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. A v v/*qh. 75uxvpac)mq 5.0 kg mass moves to the left at 7.00 m/s. *)m5/apucx.vqqhv7v With what speed does 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 uniform pla* q7lv04 oib67duqsqd p.nqrxm(2vu) nk 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. After the 2 do 67 d*r7muvlq4iqu0()xsbqvp nq. 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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