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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 s( 4tprl:ch ;popeed v, stops in time t when maximum braking force is applied. Assuming the bra ;rho c:pt4pl(king 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 velocity of a moving object is doubled, its_______is alsif) c0lxsd714rkq ms))neon5 /f9bkv o double5fk)nod l)e n)b9q s7/sir x cm0fkv41d.

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.06: Impulse, Fnetruj-h-. g4nd+b+pyyv $\Delta$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 mp/vh6v+t/1,nafvm5 wpj 8 ralost closely associated with the following observation aboutvvvml 1n,f +h6w pr5pt/ a/ja8 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 line:fh jcjqu* 0u;ar momentum of an object is always in the same direction as f :hjqj; u0*ucthe

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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 10w45+ : xpxjljc0 N net force act to produce a change in momentum of 200 k p+4xc jl5jwx:g.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 energ hiyc6/9l9x ,ue7vj+re4yvkw y than P if i+9e /i4whv 7ky6v9 ecy,ruljxt:

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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 mazuf m3:ix-)av ta)f n(;k* lo:2 drah c1h3zrpss 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. What is the magnit2 r nvk al():): rcf* 3xpaufa m-;zhz1tod3hiude 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 gs5npdq)ttc9a:6r1f 8n 2z rvtymnast falls freely from a height of 4 meters on to a trampoline. The trampoline then bounces her back upward witrdvzq) f8ct1tp n69n:2sart5 h a speed equal to the 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 0.dwn:hmkn(;r (a p nt40gmg j10.0 m/s when it has a collision in space. The mass’s speed was unchanged,ja m(0t.nrg p:gm4hnnw0(; dk 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,r( - vn1t t0x5lxckib in contact with 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 arrives at the bat with a velocity of tb,ctkv(1-l r x5ix0n 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 atoh: cg1y q81usgbhja -,tal 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. What is they-component of the object’s linear-ugbs1y h :8ja1qh, cg 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 object of mass M moves wit ):fovldjz80vqd8/gl h velocity V, has acceleration a, and is at position (x,y). In what direction must the 8 lvd0qo/:vg)f z8ldjlinear 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 downwa2kp-eb,pjc )ehx.y 2jocw)p mf,v +0drd 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 collision time of the ball with the ground is 0.25 s. Treat g = 10 N/kg. p p.2 mho,-d) k 02p+ebjfj)cce,yxvw
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 tn 2( ajordm.a)he ground 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 the ground is 2.)(nramoj da 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 pus** 1gb zdz.,5niiyx)m, iscy shed to the right across a horizontal surface whz1.cm5n y x**b,g,siizy si )dile 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 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 righbjqgnl/)+ 6)de :rtqst across a horizontal surface. When the boxb/6dl e)j)qt:srnq g+ 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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