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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, traveliqi 9k yo85ic.(kgll1 val t)1hng at speed v, stops in time t when maximum braking force is applied. Assuming the braking force is independenti9hk 1.g)(lcqk15yallot 8 iv 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 movis bb gp0hk01e,ng object is doubled, its_______is also doublegb s0kp,01bh ed.

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.06: Impulse, Fne zkkur813n ix5t $\Delta$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 w3*q tp2 mmc /clv59h3hgxet.the following choices is most closely associated with the following observation about an isolated object:c2 *lpt9.hvch53qetx3 gmm/w “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 linea 47 ;pqtaf5znpr momentum of an object is always in the same direction z;pp4t7 f5 anqas 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 nde5 .u1 pj;l)*us48tsidrh wiet force act to produce a change in momentum of 200 kht;e*)ujru d.pi 8 wl s15di4sg.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 kine;fh 29hwj)n3ro/rvedktvm t6- 0bda;tic energy than P if itv0jt3-r9tw/dbr vod)ehah m2k;f6 ; n:

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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 m6*b5c.ouym33 i j ge j73pdbc/xdo w4i/s collides perpendicularly with a wall and bounces off with a speed of 4.0 m/s in the opposite direction. What i 3ucb3m*6wx3oc jyd 7ij45/id b.eo gps 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 falllqvn*wid d)v :3qldy3l/ 9ij9s freely from a height of 4 meters on to a trampoline. The trampoline then bounces her back upward with a speed equal to the speed at which she first struck the tramponq:l3qd yl 993l)i dvvdji */wline. 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 df :8 dv ny)et3lg8tdsy 6hyf: 6uz.c 5xdhi-)moves at 10.0 m/s when it has a collision in space. The mass’s speed was unchanged, but the direction of its velocity was altet8y: 5s dc)y6yt8 -l ddv3 xuzi.6gh):dhnfefred 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 is in contact with the ball for a:eour:n8ibk6qbm kwd1- 9+j 9r 1 jaoc 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 th8d9+qnj: b-keru bokjcrwai61 1:9moe 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 hafn+81z ,auw5mrpt ;ve s atotal kinetic 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 plane. What is they-comp; zrea ,nvmw+1f8 5tpuonent 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 bb1 n7 apar-n+mm() e dg;wf,pwith velocity V, has acceleration a, and is at position (x,y). In what direction must the linear momentum of the object be directed at this instan)npnpfd ,w(reb 1;m-+g baa7 mt?

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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 downwardrbu k hbhh,) lnc-)-g. hits the ground with a speed of 0.90 m/s and then rebounds straight,)crblh nubgkh )--h. 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 m yfqsl2 z+-w9tay6ad5ass 2.0 kg falling straight 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 collision time ofwt yq-af 5s9ydz2+6 al 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 the right acr-jtr6 jpfba a0h*. -dcoss a horizontal surface while a constant frictional force of 8.0 N acts on the box-fa*thpb0rjj6a- c .d. 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 righgs+ i4z4ovb: jt 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 the linear momentum jbsg4:z 4 +iovof the box at this instant?

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