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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 0piwm+(t o 0/ npei,kzin 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 traveli /00tpnkw m(,pieozi+ ng 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_______ist a 6q6bhbvs;( also doubled qv(6b h;6stab.

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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 fxj0(h0 +go i:5 g(7ta hkcaaw$\Delta$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 f7,bar mu3wo xrpd.u8+ollowing choices is most closely associated with the following observation about an isolated object: b+m7uru83xo rp,wda.“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 mome8iva2xgl 4fte(s b).kntum of an object is always in the same direction as tht8vf .a 2xike4gbl)s(e

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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 fe 79 anae7ntm3nm0q6;p8mvws orce act to produce a change in momentum of 200 kg 67 3mwmepasqe vmn7a9tn;80n.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 energyuc 8yta d96:fb0t4e fy than P if dua0f4 8b6t9cyey t :fit:

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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 collidm*6j t (xl8jfpp6 g;ss*7lk wwes perpendicularly with a wall and bounces off with a speed of 4.0 m/s in the opposite directglk;p 8 m*fws6w*t(p6 xjjl7sion. 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 gb dfwucfv4rza04 r jx0 -t(1(nymnast falls freely from a height of 4 meters on to a trampoline. The trampoline then bounces her back 4 wcf b0( uf4rxznt(vadrj-10upward with a speed equal to the speed 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/s i3(1 6, jwbl hnczi)mnwhen it has a collision in space. The mass’s speed was unchanged, but the direction of its velocity was altered bywc lbz(i1m)6nn h ji,3 $80^{\circ}$. 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 bals8- u nj-xsw+u 2rrqm,l 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 l m uwqssx rrnj-+u82,-eaves 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 100.0 J andq)nex mkc0 4.fd)c yuml 7 )qdqhq/*jv060zyo an x-component of linear momentum equal to 24.0 kg.m/s. The object is moving in the x-y pl 0dyjyuqm 6))h0zfq 0e.qkd)c7v c4o nl* mq/xane. 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 (tt5 17 afr0o4gpij.krepu* y object of mass M moves with velocity V, has acceleration a, and is at position (x,y gppa45kirr(y t0jue7t.1*o f). 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 ground ycp(em,xbb3 u l68w0 iwith a speed of 0.90 m/s and then rebounds straight upward with a speed of 0.60 m/s. The cob6bxywcu 0m 3epl8i ,(llision 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 st4r)dm + 0pidmf.xob 7sujs5wg2 jdz 6-raight downward hits the ground with a speed of 0.90 m/s and then rebounds straight upiszmbw5.s- do2m4pj jd) df0g76ux r+ward 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 zt-od2/3 enaa 5.0 kg is being pushed to the right across a horizontal surface while a constaz/a2dte a3-no nt 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 e0f1x tr n:o m.9ewlfrv4u7/ npushed to the right across a horizontal surface. When the box ha uotvl4:nfxene1rrw07/ m. 9 fs 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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