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习题练习：Impulse and momentum
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 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, traveling at speed v, stops in time t w1,nj ygszd ;ec nt)o-/hen maximum braking force is applied. Assuming the bre1 )y jtz no/dcngs;,-aking 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 moving ob 9 y93 -0hvqvylp)5sjk 2dwhvz k;m:neject is doubled, its_______is also doubledk:v30j hm)2l5 y sq; y9ekpdv9v-wnhz.

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.06: Impulse, Fnetj5 f(c h6w sg..jjraa1 $\Delta$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 thd+muxp;96im de following choices is most closely associated with the following observation about an isolau idp ;+96xmdmted 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 mo7*mozda z )7kvmentum of an object is always in the same direction as v 7o7)zz*madkthe

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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 moca/w-+ixg b2imentum of 200 kgga/bxwi+ -i 2c.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 than P ifol5p 5jf q, a7klvhl9lol, 2a1 itploq9 l, ,l aha1jl2o75v f5lk:

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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 collide2w: /lohcdv)pbve1 eyh+ xg,*s perpendicularly with a wall and bounces off with a speed of 4.0 m/s in the opposite direction. What ixyovglw1cbeph,v *2+)/d h:es 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 +93kikp htm tv*:ppr0 4 meters on to a trampoline. The trampoline then bounces her back upward with a speed equal to the speed at wtm3 9hvpp*i+kkrpt :0hich she first 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 i)1hm bo.b6qwf1 9yshmt has a collision in space. The mass’s speed was unchanged, but the 1)bf y .9o6q 1mhsbwmhdirection 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 kg3dn niwg.m,r )ysk :k9o:1jmf-baseball 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 and leaves with a velocity of-6.5 m/s, what is the magnitude of the average force acting on 9fn.dksg)i :n km31: o wr,myjthe 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 enenlgr,m z4w+8b rgy 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 plag8rm+lnwz,b4 ne. 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 object of mass M moves with v-lgwtm:w m6:i;y,k;upe y vgm, j4 nq8elocity V, has acceleration a, and is at position (x,y). In what direction must the linear momentum of the object be directe;:8e; k4,6yvmgqltnygw w mi- j:u, pmd 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 downw dv483x qxnpa 72ucwr*e,z*qg ard 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 wcu2 nq ga8 p*qx*vz3dxrw7,e4 ith 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 downgv+f5dmi 0b )nyujel )9o59fx;nd6yjward hits the ground with a speed of 0.90 m/s and then rebounds dujeixdnv)6 95+0oj5; g9nlfymf)b ystraight 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 beingl3b, ud +pv ma0rf7si+ pushed to the right across a horizontal surface while a constant70d ibr,m 3flp+u s+va 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 being pushed to the right across a horizoqbyz15pfi t1 ;ntal surface. When the bo zp;byi1t1f5qx 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 the linear momentum of the box at this instant?

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