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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 speeon/ehsa.4zr m5 gxni - 4h3gk6d v, stops in time t when maximum braking force is applied. Assuming the braking force is independent of mass, what time would n3 4e/m6nx4hskg- 5.h oag irzbe 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 object is doubled, its_7ndl 3 kqjcm84______is also double cmnq 48k7ljd3d.

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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 ze h,+fmcy j4/$\Delta$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 choi8 ppkstl z+f::kg7w.j ces is most closely associated with the followintgskj:fz7l8 p:. wp+k g observation about an isolated 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 the same direcz4t0su1 vtu 03jmy v8ption asjs t4puuv0 0 ztm8y31v 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 change in momentum of qy5euz; e78gt200 k;ue eqytz578 gg.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 h.3cdf;hx(b te8c4 i bmore kinetic energy than P if itbh.ex h(f;8 bc4idt 3c:

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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 spez675ol dheb2 ged of 6.0 m/s collides perpendiculareh76lb5og d2z ly with 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 height of sfu+fe r26s6uo(e)ys4 meters on to a trampoline. The trampoline then bounces her back upward with a speed equal to thees ufs 2rse)ofuy+(6 6 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 when it has a collision in space.( s p ;sp8dke g8en)x7*b-pxla The mass’s speed was unchanged, but the direction o*sx g-)8;k 8pdaelnsbx (7pp ef 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 is in contact with the qo-6;:9my ec9 gruqaq tg k r,g76c2cxball 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 yog,cu 29rq7ctk6:-9 ex;rq6qac ggm 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 rlris5 ;abx4y kf 9b(tm3 ed+,g has 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 plan53e+ty(9bx; dirbfs ,lm4r ake. 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 pointa*ngajv5 fg8r*cw s0 ) object of mass M moves with velocity V, has acceleration a, and is at position (x,y). In what direction must the linear momentum of *j nwag a cfvg*r05)s8the 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 u1l f a5 p-(q8nx,u7xd;i.l 7s bskcchsv*r9dkg falling straight downward hits the ground with a speed of 0.90 m/s and then rebounds straigu*1bhl7dqsd;s89xf xv.7lrp(5a nc i ,cu- ksht 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 mass 2.0 kg falling straight downward hits thw fb djfyd*r-6u *e*c:bfzn5+ e ground with a speed of 0.90 m/s and then rebounds straight upward with a speed of 0. d bdz +ff56* ncy*-jf*eubr:w60 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. pgxfzea44d:1j1c94h bu dg0h 0 kg is being 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/sj: ghac14z u 4 fhd1gx9dpb4e0 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 b7,jnc2.vyjdf52 vq gpushed to the right across a horizontal surface. When the bo.vjqg ,nj2 75fdc2yvbx 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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