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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, trpqrfd3t - -p.paveling at speed v, stops in time t when maximum braking force is applied. Assuming the braking force is independent of mass, what time would be required to stopdf-tp-3q.p p r 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 d1gt 7d nf ik71uv*f7mdx.6lm toubled, its_______is also double.16f tkixdmv77d 1*t7ngu flmd.

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.06: Impulse, Fnetpfghxb1l ./ :w $\Delta$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 asc/0lr afhj 9i7sociated with the following observach7f a/0lir9j tion 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 directih d871(fqurle h;o+rvon as theh(hrqour 8 ef;+l7dv1

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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 oh4p1x7qwz0 tj mi1t *vf 200 kg.m/1 miv7hz4jqx t p*wt01s?

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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 morml0.api/ s x)0zqsw(we kinetic energy than P if itlxssp0a /mz.( q0 )iww:

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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 colli;5.x yq v w0xtt:rur)p9ofs h9des perpendicularly with a wall and bounces o :xvhtrpyts)wxq 5f 9;.r9uo 0ff 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 fre ,;0mhu ue0osz5n q;yyely 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 trampoline. What is the avera00q,yohm;znyu 5;eusge 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 mass2b jj sa.vr)k;dm;s9m moves at 10.0 m/s when it has a collision in space. The mass’s speed .j2 ;sr9a)djbsk v;mmwas 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 ball for a tenj/nc300xgu ime of 0.03 seconds. The ball travels in a straight 0u 3x 0/ngcnejline 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 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 tchdmy8m9:le b*3y i qk y.1m2mass 4.0 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 plane. Whattm:8k2ey1 dlyibq hc9.*my3m 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 point -kgh5x:ot ) ek.q z0jfobject of mass M moves with velocity V, has acceleration a, and is at position (-khz k :q.jftogx0e5)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 grou 3:m abd(o502gk aigkxnd with a speed of 0.90 m/s and then rebounds straight upward with a speed of 0.60 m/s. The collision time of the ball with tkogi:d 03x agkm5ba2(he 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 2qh9uwm +ehl4cv2y8rwc3 j2 )l.0 kg falling straight downward hits the ground with a speed of 0.90 mm )9vu+2cc4w3ll hy rh 28qjwe/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 rig *r ksy)ci;kv)ht 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 an acceleration ofv)c;k i*yrs)k $3.0\; m/s^{2}$ . 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 across a horizont3k f9 ;tmzgvr,u itxtkkl.x u5vo4 ,3h2s8pe7al surface. When the box has 12.0 J of9lmk5,8guh3ts.3t2 okx7tkx4p ,ufvre z;v i 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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