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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 iy.oesv:1w v tsj 3*2fun time t when maximum braking 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 wf 3u2vvs:*e.s to1yjv?

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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 ofi kfy12tvpjb3887s f s a moving object is doubled, its_______is also doubled. 12sft v7 3if8y8pbsjk

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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 s ue(*1ms msb+$\Delta$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 a)kse ;tiep 43closely associated with the followi ;p4e ka3e)istng observation about an isolated object: “The linear momentum of 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 dh;acd) 67ja :z- phowis always in the same direction as t hdo-dh 7zw :)6capja;he

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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 1004t34/ufylds i1 i qq2i N net force act to produce a change in momentum of 2042 iil f1si/4q 3dytuq0 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 3z9 q7m v99mnw0ikcav more kinetic energy than P if wmzqvkm399ca ivn0 97it:

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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 s0qv dgry)+*qam3 hw/h:e4 ie6.0 m/s collides perpendicularly with a wall and bounces off with a speed of 4.0 m/s in the opposite diry3i/am)ghq4 q*e+w vsd0h:e rection. 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 frz4:9me fcgg 2hsk-i 3reely from a height of 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 is the average force the trampoline applies gezm ci4fs:-9k g3 h2ron 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 10.0 m/s when it has a collision in space. The ma 2tpe (8jj)f3u( jjsxqxrl.b +ss’s speed was unchq )tj2pj jx8bjx(f.e3+(sl u ranged, but the direction of its velocity 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 forq:q y+rm2m *tw a time of 0.03 seconds. The ball travels in a straight line a2 my*r:wqqmt +s 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 average 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 4.0 g has a.h-)8tj,cbrcemfj ,ue(j, t dtotal 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-component of the objectbhuj mde j) ,,e(,rcft-j.8tc’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 )govy 06h*g7xwf gm9rtime t, a point object of mass M moves with velocity V, has acceleration a, and is at position (f0wgv7*gyom9x6gr )h x,y). In what direction must the 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 falling straight downward hits the gzgmj6 frjg8:ct)/ ) y jgk)pldznr7cl.9/g8wround with a speed of 0.90 m/s ac)p6c) / .lglrgk m9tfy):d/r w j 7zjjn88zggnd then 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 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 kgnvd4 -+o2v;ikwbx.m* i2qlwv falling 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 time of the ball with the*iv2dq.vvn k;l2 x+o wmi b-w4 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 to the right across a ho:w9siu)7y ugy rizontal surface while a constant frictional force of 8.0 N acts on the box. At some inst:w 79 gsiuyuy)ant 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 12.0 kg is being pushed to the right( a r3ct;0yylx across a horizontal surface. When the box has 12.0 J oyta ;lcy3( rx0f kinetic energy, a 12.0 N net force acts 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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