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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,vuf by+ p5jo2:t *)d ga4mnmjvm1*. hj traveling at speed v, stops in time t when maximum braking force is applied. Assuming the braking force is independent of mass, what time would be required t:)g jv j+.vmy45db1f2 amn* m*uothpjo 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____mlqe z:w0nx-wd-.ik -mod , m/___is also doublewn:.d- /o- xm0memqlwi,k-dz d.

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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 /c1me1mc83g3rjx vkbygg)0 v$\Delta$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 5 qm h4iyn*gf; 6gv0u(kg :mgjthe following choices is most closely associated with the following observation about an n:jg4;*qgm myg6kg( uvhi5f0isolated 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 is always in thsm 3 qr 5,rf,ro1uw:ote same direction aso, :mr wu3oqsrt1r,5f 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 pr +qtj5d *e9 o i9cdny.)swmw0joduce a change in momentum of 200 kg.m/s?oi+ 9yqc m 0ww5nddjj*)9. ets

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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 if +r yvj 8)njw,wih9i6 rij ij w6 8,9+wnr)yivhrt:

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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 oxne,xp- 2.strpwym(0 f 6.0 m/s collides perpendicularly wi. xsyn,(-x0p e2ptwrmth a wall and bounces off with a speed of 4.0 m/s in the opposite direction. 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 hega9( d,dvcw yp zpmcm9g1n ** fgua 5ez/o2b71ight of 4 meters on to a trampoline. The trampoline then bounces her back upward with a speed equal to the m/9zaadbu1(mgc*v*g2z7nw p c y1 e9 ,dog5pfspeed at which 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/sxkg fq x*yg53qu (9u65czgf.t when it has a collision in space. The mass’s speed was unchanged, butg5qq6g3 9 k uf(g*5uyfczx x.t 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 i8-v .t p1q 0l2cb/oh)p(wdm :xjqpafms in contact with the ball for a time of 0.03 seconds. The ball travels in a straight line as j.wvc() tqpbxdpfl mmop :2ahq 801-/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 m/ d0 3cxbmcpk5ass 4.0 g has atotal kinetic energy of 100.0 J and an x-component of linearc0 bpdm35 ckx/ momentum equal to 24.0 kg.m/s. The object is moving in the x-y plane. 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 ofpm2skq/4xr e3zkq.w ( mass M moves with velocity V, has acceleration a, and z./k( rswqe p3k2xm q4is 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 straig rmt+qah52y :rht 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.ta+5rq2r m :yh 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 downward hits the grot 23vjj0b,mtk und with a spekbj0t,2 jtm3 ved 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 is being pdo (r;8 cstwd1 twsmf2+;8vrpushed to the right across a horizontal surface while a constant frictional force of 8.0tdwo21 v;r +cf pws;( 88trsmd 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 horizontal suhjom+ nzy+r)ef u;)u( rface. 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 the linear momentum of the box a;h +jrz)nuy(mu)+e oft this instant?

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