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习题练习：Impulse and momentum
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 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 maximu gvqpl47nt)j nq6-cw)m braking force is applied. Assuming the braking force is i7gvj)pqw -lqtn64c)n ndependent 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 t0up;ck-x0/ah6/fxc, +rsa nbl(l qpa moving object is doubled, its_______is also doublecus q+l/6p0rhpa0ba-x tl( ,kfx c/n;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, Fnettqtor: ; y,2fu $\Delta$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 m5kkj8j:9pnwunja n3y y0.9wu -yvi5y ost closely associated with the following observation about an isolated object: “The linear momentv y50jknyk-y5 pj 3a98 9:niwyj.uunwum 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 m,ee:c 0mlpg1b 8hjkvf)snt)m/ 11jpqomentum of an object is always in the same direction as t:1l sn ejvc)8mpe hg1 fq0tb)kp,m1 /jhe

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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 o ha*dngt3 3/tnet force act to produce a change in momentum of 20 a htg*/3n3dot0 kg.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 theyw d;*te-k yr.0-hwyh same momentum. Q can have more kinetic energy than P if 0;-*w- dkryty yhw.heit:

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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.pd/t: f:gasw/6k6n u o50 kg and a speed of 6.0 m/s collides perpendicularly with a wall and bounces off with a speegf:pko u:66 /datws/ nd 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 q;wuva77,ncxgymnast falls 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;c7a7,nvq wx u 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 coll 0 3d5sg fub/*xf5nrfbision in space. The mass’s speed was unchanged, but the direction of its velocity was altered b 0ubgd5f/ xffbr* sn35y $80^{\circ}$. 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 gw21dw 4zwj yvsxb-hw)2 l1h3time of 0.03 seconds. The ball travels in a straight line as it d4) w1-j2lyhzxbs1hw3 w2wv gapproaches 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 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 gct4cc.;omy -bj :, hmn has atotal kinetic energy of 100.0 J and an x-component of linear momentum equal to 24.0 kg.m/s. Th:joty,mc c n;c4h- m.be 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, a pob6(.dl g0yk y+:kadbaint object of mass M moves with velocity V, has acceleration a, and is at position (x,y). In what direction0 yk.kdb:a+g6l d(bya 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 s+3m/s6bvep 4mh ljz vwo7xr 7g:yjd+h1r0(iytraight downward hits the ground with a speed of 0.90 m/s 7d+rpj4(/by: +vwj hr036lz1iosm ymxev7hgand 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 e/pkyn8 erl4p+t k/v0 gw38vcmass 2.0 kg falling straight downward hits the ground with a speed of 0e4n tv k/yg3ev wlckr/08+8pp.90 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 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 aok+uuxu5 icsllaa-:j1 9b4o 1 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-uosu l1 x+54ijokul a1b a:c9 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 right acro9,zn s bpz0g ;yhut (8bgs5tdxb,yz08ss a horizontal surface. When the box has 12.0 J of kinetic energy, a 12.0b xz hbb;8g9 sps0(8dyt0z n,zg,tuy5 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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  • 姓名:游客(未登录)
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    总分:17分 及格:10.2分 时间:不限时
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