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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, travel 09(4wspftz11 wrwjm xing at speed v, stops in time t when maximum braking force isj1p zm09w fx( wrw4t1s applied. Assuming the braking 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 objectg- l y13th 0 ns.eyr0-2tkypda is doubled, its_______is also doubled. 1kt-y0 rs2edyat.lngh30p -y

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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 ebpays. y:yo lzoy/)v99p)+ari h1d7 $\Delta$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 closelg(7 *sf7l 2u5pvtqwor y associated with the following observation about an isolated object: “The linear momentum of the object is couoqrfp5t sw7 2v*7(g lnstant.”?

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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 linearw4)v*z c +xshy -yme.z momentum of an object is always in the same direction as thmyz+ es*czh-) yx4.wve

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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 oz06y,bsb-yn hs p2xjgdc/l6e:qs4j 8 f 208zlhs6ys6 s/e2n4q: dxjcbgpy- j0,b0 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 / zys5t9kpj lwg n 7sbx22o4lso;5ki1czpu((the same momentum. Q can have more kinetic energy than P if 5gszu5 c 2(sllo/x;zt okbp7 yk21p4s(jin9 wit:

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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 cogtohdr11txt m 3 s5oo8wrn 5z4;0ehp ,llides perpendicularly with a wall and bounces off;tgn8o d14t5mr zr,3h1opo e xwt5hs0 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 frof a 1z/.bjhxccm6(a plx -t:: nbp.h(nm 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 average force the trampotnbj: x ap la.h1c(b6: -cp.zxh(m/ fnline 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 ha3w7e usb5lv3af*9y kvxze0c hvk/+ -xs a collision in space. The mass’s speed was unchanged, but the direction o l3ux5 xz f3 w7ka*k/h+vyce -90sbvevf 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 an9u0ystr 3o(4x//wg 4c+hfkymc2z g l 0.125 kg-baseball is 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 b+ cl4g/09to3sxk 4gcyfn2wu r( /hm zyat 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) h3a1kn g. dzw3 kscipo00i3u.0 g has atotal kinetic energy of 100.0 J and an x-component of linig cn13kwu 3d0kohz0.a)3 ispear 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, a point object offma 81,0qencl mass M moves with velocity V, has accelcan ml0fqe1 ,8eration 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 (bu3yumb 9b v42.0 kg falling straight downward hits the ground with a sb3ubu(9m bv4 ypeed 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.
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 the ground(c. m*)ybxal c with a speed of 0.90 m/s and then rebounds straight upward with a speed of 0.60 m/s. The coc )* bxamcly.(llision 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 /s;au:kefxcd p0eh(7ackte57 zm ) q 45.0 kg is being pushed to the right across a horizontal surface while a constant frictional force of :/ ap5m)ctu;efz7 esdk7 x4a0hekq( c8.0 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 right across a ho/s.,1u sm4 t4gbrmw, hf1oi purizontal surface. When the box has 12.0 J of kinetic enero1p ,4 ru4/mhgts1i,.bfsw mugy, 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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