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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, traveling at speed v, stgg; i o c)3leb-me1;ytzv4f+*ows iy3ops in time t when maximum braking force is applied. Assuming the braking force is independent of mass, what time wou1g 3g*;itc 3 e+f)-oywilv4e;moy z sbld 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 o:; ojbg (v+wv)fig *qdbject is doubled, its_______is also doubled* v+qi; g(w)gvj ofb: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, Fnet5jj 2;lki83u0 y;9np 1aetpcaysr5 bw $\Delta$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 associated(6r reahj. )xf with the following observation about an isolated object: “The linear momentum of the object is.aj f(hrx)er 6 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 lrbr9t/zojd30r - 9 n;7rly7 rjg4dae uinear momentum of an object is always in the same direction ;j-39djgo4r nertr7 y l7zb0adu r9 r/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 net force act to produce a chan s1i3*cq inoids 14zx9ge in momentum of 200 zq1o i139i* d4i sscxnkg.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 /i 54 bfoo l:2pjuw/klenergy than P if itko/5w:f4lip b2 uj/ lo:

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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 + rl96iaqtlo5 collides perpendicularly with a wall and bounces off with a speed of 4.0 m/s in the opposite direction. l5q6olita9 r+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 height of 4 meters on to b(avvygca. f:c 5.ylz s,r+b:a trampoline. The trampoline then bounces her back upward with a speed equal to the speed at which she first struck the trampolineyb: .vfsyc(lcav5: ag +z, .br. 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 moir9:o /*3t*ogg ib:a ypdc,aoves at 10.0 m/s when it has a collision in space. The mass’s speed was unchanged, but the direction of i9o:y ra*g pcd:*o,/iagob t3its 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 is in contact withdi,yg5+a*0z ldcqm x.qkq;(r 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 ari *(qkqd+md rq,c x.la;z5gy0 rives 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 mass 4.0 g has atotal kinetij z l,f x.s4ficx+9jso.6oy(ic energy of 100.0 J and an x-component of linear momentum equal to 24.0 kg.m/s. The object is mov .o6cjzisjs9(x, ilxf+. y o4fing 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 f)mc /ff/i8o8w2zpgc t, a point object of mass M moves with velocity V, has acceleration a, and is at position (x,y). In what direction musto//p28c8 gffim f)zc w 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 falr ph150ixh o0bling 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. ph1x 0b h5rio0The 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 ball4w/wtijls7p 1 of mass 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/swl74ji1 /tspw. 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 ksyh8- os.qr q4cos,0being pushed to the right across a horizontal surface 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 ac8ysoqqrs4h, 0 .so k-n 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 rigjdfi5if g) lv7xfgj ( ..l7wv,ht across a horizontal surv.l ( 5fxdvwig,i77. g j)fljfface. 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 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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