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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: 游客未登录  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, travelinyft54l+viicjn 7 z5c lzcn ;4+ijl :sc)/jq;ug at speed v, stops in time t when maximum braking force is applied. Assuming the braking forcequcsy+lij nliilvnj /4zzf5cj 4 :tc7 ;)5+c; 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 moving object is doubled, its___l5,*0o1cskde wq rf (z____is also doubled.5*1, qcrk0s owzedfl(

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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 q,no5ealx +h7 $\Delta$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 associa rzta yo,6knd)c7 xu22ek3.h qted with the following observation about an isolated object: “The linear momentum of toy r2aqn 26 ),7e.3hzdxt ckkuhe 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 always in the same dirr pr rw /dj3g*xtp2m0:gfp5:i ectiom5p p 23jwr :grx/*:igpr tfd0n 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 netxus8 nsc78hp842nf rrlx *r oh5e+lb ) force act to produce a change in momentum of 200 kg.m/sps8lx75 )nnr*o sce8+lbuh4r8 f hx2r ?

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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 e+hbic:kq; lf+wh z8t8maf. g6nergy than P if it hf:c8l6+;+h kbz .gmf8wai qt:

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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 * ( hcdiw kvn(hcv:.d:a speed of 6.0 m/s collides perpendicularly with a wall and bounces off with a speed of 4.0 m/s in the opposite direction. Whatdcw(k h(d*v: hn .vic: 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 of 4 metersxl zfj*qk+o*gqq2 c/ 2tqph23 on to a trampoline. The trampoline then bounces her back upward with a speed equal to the speed at which she fir/q 2o2kj*cqtxg*3fpzq 2qlh +st struck the trampoline. What is 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 10.0 m/s when it has a colls-e8h1(ba*.g y la awxision in space. The mass’s speed was unchanged, but thewasyag-l1x*a.h(e 8 b 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 islulbr 4j*s0 .d 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 and leaves with a velocity of-6.5 m/s, what is the magnitude of.rlb*ju ls04d 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 kix8/: shcl+jk t. t2x dl7ayde,netic 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 planat tx,dyl 8/khs7+djxc l:e2. e. What is they-component 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 objeh+- eca-x+ ,gk 0oxyopct of mass M moves with velocity V, has acceleration a, and is at position (x,y)xck- 0a+- ogp+ehox,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 hitsoah6nu+st- y)6lk p1)t2q sjd the ground with a speed of 0.90 m/s and then jt66 sk)d1hlq2t ano-py+us )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 kg falling straight d8bsg,dj0gb i.3zzo 2 zownward hits the ground with a speed of 0.90 m/s and then rebounds straight upward with a z3 ,bzj0.2 zsiogdgb 8speed 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 to thbk i.(74t h0q nv:md4qafiei+e right across a horizontal surfaca4ti4 nq+evi7 :fhidq0k(m. b e while a constant frictional force of 8.0 N acts on 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 beingem 1fn *2txd;e 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 represen;x 1fee 2tn*mdts the magnitude of the linear momentum of the box at this instant?

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总分:17分 及格:10.2分 时间:不限时
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