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习题练习:Impulse and momentum



 作者: admin发布日期: 2024-08-07 16:03   总分: 17分  得分: _____________

答题人: 匿名未登录  开始时间: 24年08月07日 15:54  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  
  94.16: A car of mass m, traveling at speed v, stops in time t when maximum byvr i/umsl,ioa(7); drakinid v)u(r/may,s7lo ;i g force is applied. Assuming the braking force is independent of mass, what time would be required to stop a car of mass 2m traveling at speed v?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.04: When the velocity of a movi0,te: bfe qqwro.-1q is s.jqozre 904ng object is doubled, its_______is also double 0,qewqz1se9rq:t .f.eojisr -o4qb 0d.

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.06: Impulse, Fnet k9go;pd )wuvhnyu/mn :( uy 0bk): q.g$\Delta$tis best related to:

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.05: Which one of the following choices is most closely associated with the n gzcx-n,q87cd nf t17g5f)bxqb zp+.following observation about an isolated object: “The linear momentum zzf -qg.bn1 cx5fq)cxnngbt77p +8,dof the object is constant.”?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.21: The change in linear momentum of an object is alyson zthi;* o2w2z.;s ways in the same direction w.2zot;z2* ; osinshyas the

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.08: How long must a 100 N net force act to produce a change in momentum of 27 h*rymx1f(k5 cfpswu44q e9d)zfq p -00 cru4z(h47de)f wf -qfx yqpk51p9*sm kg.m/s?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.29: P and Q have the same momentum. Q can have more kinetic energy thl 97z qen8(lglan P if il8 7(l9qegnlz t:

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  98.26: A ball with a mass of 0.50 kg and a speed of 6.0 m/s collides pd- l+9zsrh0 ekfan3d/v:nz 4e erpendicularly with a wall and bounces off with a speed of 4.0 m/s in the opposite directio ne3keah0n9 r-s+fv lz /4d:zdn. What is the magnitude of the impulse acting on the ball?

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.08: A 50 kilogram gymnast falls freely from a height ofmgcp; h vev0:5ry( hf) 4 meters on to a trampoline. The trampoline then bounces her back upward with a speed equal to the speed at which she first struck the trampoline. What is0(hrf)vym; c5g ep:v h the average force the trampoline applies on the gymnast?

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.27: A 2.0 kg mass moves at 10.m3caxf7vp 1 qv o2o * 9 klb0h6y)c/:bbs2cwxh0 m/s when it has a collision in space. The mass’s speed was unchanged, but the direction of its vv:)q2co/2 habb09 x * ocwv bcpk3fsxm l76hy1elocity was altered by $80^{\circ}$. If the collision lasted 0.25 s, what was the magnitude of the average force exerted on the mass?



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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.13: A bat striking a 0.125 kg-baseball is in contact with the ball for at6 s tva1* chva+,-due time of 0.03 seconds. The ball travels in a straight line as it approaches and then leaves the bat. If the ball arrives at the bat with a velocity of 4.5 m/s and leaves with a velocity of-6.5 m/s, what is the magnitude of the ,ve1vd*a +6sc- atuhtaverage force acting on the ball?

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.43: An object of mass 4.0o-gch p c9-cqef.x4n4zdz77d g has atotal kinetic energy of 100.0 J and an x-component of linear momentum equal to 24.0 kg.m/s. The object is moving in the x-y plane. What is they--- 9zpdfec.zxqd74 gcnoc 4h 7component of the object’s linear momentum?

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.05: At an instant of time t, a point object of mass M moves with velocity V,bb mtcmvhl3pu;i4(5 cp,8j 3z7 ire l7 has acceleration a, and is at position (x,y). In what direction must tipu,zl3 b7eplrjbm74htc( c;i 85 3mvhe linear momentum of the object be directed at this instant?

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.32: A rubber ball of mass 2.0 kg falln,+*vw4o p/c .s)pmcw fi y;fding straight downward hits the ground with a speed of 0.90 m/s and then rebounds straight upward with a speed of 0.60 m/s. The collision tim/ ,i+wo spfcy mvnf. ;p*wd)4ce of the ball with the ground is 0.25 s. Treat g = 10 N/kg.
What is the magnitude of the average acceleration (in units of $m/s^{2}$ ) of the ball while it is in contact with the ground?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.33: A rubber ball of mass 2.0 kg falling straig br9codp;,f 8ght downward hits the ground with a speed of 0.90 m/s and thd;89rc bg opf,en rebounds straight upward with a speed of 0.60 m/s. The collision time of the ball with the ground is 0.25 s. Treat g = 10 N/kg.
What is the magnitude of the average force (in units of Newtons) exerted by the ground on the ball while they are in contact?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  14.12: A box of mass 5.0 kg is being pushed tox e8:ow+ /gtf+ciuiu; the right across a horizontal surface while a constant frictional force of 8.0 N acts on the box. At soui+x f: ; teuc8i+gw/ome instant of time, the box has a speed of 4.0 m/s and an acceleration of$3.0\; m/s^{2}$ . What is the magnitude of the net force acting on the box at this instant?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.12: A box of mass 1e36cfb -g(gr1ea3 xr l2.0 kg is being pushed to the right across a horizontal surface. When the box has 12.0 J of kinetic energy, a 12.0 N net force aeb r(rle g g6c3fx-13acts on it. Which one of the following choices best represents the magnitude of the linear momentum of the box at this instant?

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