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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 maximpu)sis /1w(7rso2h oe um braking force is applied. Assuming the braking force is independent of mass, what time would be required to stop a cahwou e)s1s(or 7ps2i/ r 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 azk4ne ..wem4gix0sd 6 moving object is doubled, its_______is also doubled.ez4 ds.4.0 g6kinx mwe

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.06: Impulse, Fne3wt4w hezcph)9y2fy- (q rr2kt $\Delta$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 fo s*w* d0*jejwallowing observation about an isolated object: “The linear momentum of the object is constant.”?*j*0da wwjs*e

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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 moment/qf,0ufea-i l um of an object is always in the same directionif /f0qa ,-ule as 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 am2qc l o1gjdkbl;-. 0s change in momentum of 200 kg.m/;k2ld.lg0c os-1q mbjs?

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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 kinetidtl w0bshstl 1 :n2u27c energy than P if d21lwhtt0bl 72ns us :it:

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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 b,y8gdj* wn /8ad)b:xj r:heaperpendicularly with a wall and bounces off with a speed of 4.0 m/s in the opposite direction. What 8ajb: h:,yj) xde bw*r/dgan8is 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 of 4 m )6nj7lzz.iai+vlae*7 mbo6leters 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 trampol *vn.jil zlzb+ o6ie77)lm 6aaine 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 10.0 m/s when it hm3 8oe9;jtpm ,+kxbkv +th ;vtas a collision in space. The mass’s speed was unchanged, but t8m9vbt;tk j,3+v mx+ope h;kthe 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-baseballetx yo r50;cd, is in contact with the ball for a 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 a,5;docx ytr0e nd 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 atotal kinetic energy of 100.np lm39d;miw,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 obje3inpm l9,dm;w ct’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,t fl1*n -jw0 cflz)5cu has acceleration a, and istw *l0-czfc1)l5 nfuj at position (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 0zsq9/f(p(/ljv fylv 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 coll0vf zp/vylq jf sl9(/(ision 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 kg falling straight dx ppx-5qmd u*byd6g7 0ownward hits the ground with g5du*q 0 -xmppyd67xb 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 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 isp7dd 6g5lixy0 being pushed to the right across a horizontal surface while a constant frictional force of 8.0 N acts onxpddyl 65 ig07 the box. At some 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 12.0 kg is being59*zs. rgat n r)fim4g pushed to the right across a horizontal surface. When the box has 12.0 J of kinetic energy, a 12.0 N net force acts on it. Which one of the following choices best represents the magnitude of z*r )gs94 ritgm fna5.the linear momentum of the box at this instant?

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