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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, stops in time t when maximume. bu-uxqa2*eke0r/ab*ww o : braking force is applied. Assuming the brak0wb.u*2u/r-x o :bak q ae*eewing force is independent 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 veloc3sdi o,stto-63)sgsq v4m1z ql x)jj1ity of a moving object is doubled, its_______is also double6t1gzslxqd, moqss o-s3j 13 i)tv)4j 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 m/ 3hj6fu-w smt x4q9egcs/r+$\Delta$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 associy83zv.jt zhk)ated with the following observation about avz kz3h.)8yjt n 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 objwue8p 4yw vemu*d3; pb;; n1xzect is always in the same direction as thenw ;3ud ;vm 8u4ypxwe1 *ez;bp

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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 momentumf m e;(vdi0m- 2czfr(u1a 9yoe+rgxa : of 200 kgrmrzed(g2+v0c1 f9a x m af i;eu:o-y(.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 mas r;ivmq ,-+zi ;fdo;vh(3wgore kinetic energy than P if irgvhmdvwa (;i3f-qoz s +;,;it:

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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 ze zcq.c,,g,(aw2q sb of 0.50 kg and a speed of 6.0 m/s collides perpendicularly with a wall and bounces off with a speed of 4.0 m/s in the opposite direction. (c.,ca,zw2q e ,q gbsz 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 hec*hj 6egu,t ke-.o8v px:cjj;ight 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 .eu86j; ,cg epc:j-khxov*tjthe 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 spam6p x cqp,7y1oce. The mass’6qo m,p pcx17ys speed was unchanged, but 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 is in contact with the ballsdnos 5*ron:5 for a time of 0.03 seconds. The ball travels in a straight line as it approaches and then leav n:n55* drssooes 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 mass 4.0 g has atotal kiikbcf )/dh;pwf6r(6 :smci 5knetic energy of 100.0 J and an x-compon) spcifid(m:r6ckk /;b6 hwf5ent of linear 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,mhnh0f b8f9dbs- zo xan71.fq 9nr7 +p a point object of mass M moves with velocity V, has accelerf+s0p9bqr98 f n x.nf1hbd7hm-znoa7 ation a, and is 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 straight downward hits the grotfv )8z aqjhg9o 1;r)es(-q ynund with a speed of 0.90g ;ezrq )-()yqhvt1nfsjoa8 9 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 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 h3da:yh8g 2 q(i8s lywfalling 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 colhsd( 8wh8gy:i q ly23alision 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 pushed to the right across ftvww v+x:(b(cz1rbwvtg3 +4 a horizontal surface while a constant frictional force of 8.0 N acts on the bo t+t14 wg(zbvrvw (x w:+3bvfcx. 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 tia eww l*09 itua3/)hzo the right 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 of the box at this instantt3ah ie*w/u9azw)l 0i?

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总分:17分 及格:10.2分 时间:不限时
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