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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 speed v, stops in time t when t9dd)g u w b7sen yn2zzx9)p3/5wog0t maximum braking force is applied. Assuming the braking force is independent of mass, what time wo/neo0ws d3b7w) xg dt9z9z5n tpygu2) uld 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 n(fiozo.6/usmp ( z8smoving object is doubled, its_______is also doubled.osm(znz o 8f.6 pu/is(

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.06: Impulse, Fneurg19hpz zj/r+y c3a1t $\Delta$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 associryof mf99jkmw+d :l, ljaa7/. ated with the following observation about an isola/jl ma w9kolj .y7amd9f+rf,:ted 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 o l *bb7-gkbq.5 pwcod)f an object is always in the same direction asbkbcqo)w ld p*g 7.5b- 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 pywyjcf), yv (u91oa +droduce a change in momentum of 200 kg.m/1w,a c()jy9ufo d+yyvs?

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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 morg3 urip)g86hlfvk)xi0 5fu 7ce kinetic energy than P if 5pi7v3krxhi0 uuc 8fl) )fg6g 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 of 0.50 kg and a speed of 6.0 m/s m f+fhi 638dqhcollides perpendicularly with a wall 8h+ 3fimfqdh6 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 :c-bdhhxva 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 average force the trampoline app;h,dah b:-cv xlies 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 /54uf(fksa o) tpzcis mf(* .om/s when it has a collision in space. The mass’s speed was unchanged, bui/tofo(fp )fm 5 (u.*4skzasc t 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 hv 6(.h u(watjko2/nv7 usf 9nin contact with the ball for a time of 0.03 seconds. The ball travels in a straight uv ho9 a 6jv(nfw7 (htsk/n2u.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 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 kinetic energy of 100.0 J and an xgd:e z6 q5jauk/14 lxx-component of linear momentum equal to 24.0 kg.m/s. xlx1 4/ 6:ukdga zq5ejThe 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 point object of mass M moves with v3 *mo+n; vmrghelocity V, has acceleration a, and is at position (x,*h vmno;r3mg+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 ground le6os fc409 n2 t2xxwozlb 6hlf.zrek-7xn79 with a speed of 0.90 m/s and then rebounds straight upward with a 9xx7xt 29 senz h62bno4zffkl.-le0wc 6lr 7ospeed 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 2i vrp;44c4m s: enaa:t.0 kg falling 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 collision time of the ball with the ground is 0.25 s. Treat g = 10sea;a4cm:vir np4: t4 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 acroshl+) gyq 9ehoeu:i/exw;64yg-s y o(es a horizontal surface while a constant frictional force of 8.0 N acts on the box. At some instant of time, tho-h ew;eg(o leyue6xh)gi 9:yq sy+4/e 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 right across a hor-4rnauetkpv e6 x 8*s6t5k1woizontal surface. When the box has 12.0 J of kinetic energy, a 12.0 N net force acts o4k*8wupa6 6tvx1t5 sneke ro-n 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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