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习题练习：Newton’s law of motion
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 作者: admin  发布日期: 2024-07-30 13:02    总分: 43分  得分: _____________

答题人: 游客未登录  开始时间: 24年07月28日 14:39  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  
  99.36: What happens to the inertia of an object when its veloc+8m m;8jzpc:m1eyngj)t*o f oity is doubled?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.14: An intrinsic property of matter is one that does not depend on the qp 6 v0/0/6la3aobkwx ocu .mbguantity of matter present. Which of the followib0ao6.3kx/uwocv/p ag6l m 0bng properties is NOT an intrinsic property?

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.16: A 20 kg boulder rests on t81/eaexdwj e*he surface of the Earth. Assume the Earth has mas1aj8/ *wde eexs $5.98 \times 10^{24} \; kg$ and $g = 10\;m/s^{2}$ . What is the magnitude of the gravitational force that the boulder exerts on the Earth?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.12: A 5.0 kg sphere is in free fall near the surface of thr ,o:p9* 0furd8cf ecunji1b6e Earth. What is the magnitude of the gravitational eu1fo d9 6:frrcu pijbc*8n0,force acting on the earth by the sphere? The Earth mass is $5.98 \times 10^{24} \; kg$ .

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.09: Is it possible for a0sdt1ild h e.ag*3z/p r*gwu4n object’s velocity to increase while its acceleration de4/*atlzu.pgr *h e3dd iw0g1 screases?

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.11: A certain particle undergoes erratic motion. Atqgix.4f;)x;nvunnp 19ji x b u5yv x43 every point in its motion, the y;4x31nvn9uf g;4x)x5 uxvn.b i jqpidirection of the particle’s momentum is ALWAYS

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.14: A block is suspended in the air at the end of a string held by a pl/ kg45hhn i:nerson. The person pulls on the string uniformly accelerating the block upward for a short time. During this time, which one of the following choices correctly identifies the Newton’s T/lgnh5hi 4k n:hird Law pair force to the force of the string on the block?

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.18: In which one of the following situajwax:; c(e9 ietions is the net force constantly zero on tix ;e(c9a j:wehe object?

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.28: An object is in free fall close to the ground. A gn10fly/ oxoqnzta49;3l +mnperson intervenes and slows the object uniformly to rest. Which one of the following statements must be true about the magnitude of the acceleration of the object as it is being stopped by the person? The mog;mnx 03 n/yn z4fal9 lt+1oqagnitude of the object’s acceleration is a and the magnitude of the acceleration from gravity is g.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  98.03: An object in equilibrium has three forces, F1 of 30 0p pfivyk m)7-N, F2 of 50 N, and F3 of 70 N, acting on it. The magnitude of the re7p fm pky-i)0vsultant ofF1 and F2 is

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.07: A force of 6 Newtons and a force of 10 nc0l y.a2iac kc:s8 bw(ewtons can be combine to form a resultant with a magnitude of whichk .8s:wy2ai ccla bc(0 of the following

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.06: Which of the following statements is most closr9jikeh (a6qf9xhx ge(19c vnc* je )+ely associated with Newton’s Third Law of Motioq j)69xhrvge9ni (afh *c1 jk+ec9e x(n?

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.06: The reaction force does not cancel the action forvm6h tm3d/sl2r27 m+ 1 xntsxzce because:

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  14.14: A box rests on the floor of an elevator. Thl +l+an0ks s*n22 w2kcu s2s)xqntx m;t.6mkre elevator is accelerating upward. Which one of the following choices best represents the Newton’s Third Law pair force to the gravitational forcnkxsts0q6sx2u. ctma)l+l;s w+ 2 nk22nmk*re acting on the box by the Earth?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.15: A skydiver falls downward through the air with constant speed. Which oi.wj: j/+ 6+ilmx xk4f:g x fafmx5bl6jtz6 1vne of the following choices correctly describes the Newton’s Third Law pair force to the air resistance acting on the skyd 6:6mvj5j6.m1/bi4x: jt f z+ax xwfgixlfl+kiver during the fall?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.08: A baseball is thrown by a pitcher withzqr6/ pi/2cga a speed of 35 m/s. The battersw 2z6cpqi/a r/gings and hits the ball. The magnitude of the force that the ball exerts on the bat is always

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.13: A physics book sits at rest on a table. On top of the b+o a. st g.64irqhnqy ,ys8d;aook is a calculator, also at rest. Which one of the following choices is the Newton’s Third Law pair6yih8 ,qa.odgs y.; 4ast n+qr force to the force that the table exerts on the book?



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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.06: The students in a Physics -bfjsn 29.oxx yg5cc,I class were in lab conducting an experiment related to Newton's Second Law. The collected data were di o5x.gx2-syj bc,nf 9csplayed on the graph at the right. From this graph, what conclusions can the students make?


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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.03: If the net force on an object were doubled while at the same time the maslje(t 1 kja-9-oxja33qqfj v 1s of the object was halv1e 3l ovf3ktxq1 aj(qj-jj9 -aed,then the acceleration of the object is

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.15: A car whose mass is 1500 kg is aov4+hty0c4 pbccelerated uniformly from rest to a speed of 20 m/s in 10s. The magnitude ofv p+b0hto c44y the net force accelerating the car is:

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.05: A tractor-trai t9k y +x9i+hb1ptxsw vfh;3cb5c k29kler truck is traveling down the road. The mass of the trailer is 4 times the mass of the tractor. If the tractor accelerates forward,9x 9v+y;hxbpk3hb fkc2 k+9t wtsic15 the force that the trailer applies on the tractor is



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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.16: Which of the following principles best explains why large trac i*sd(rsz(+i pe 4jec(ql0k7qtor-trailer trucks geneiel(q *de(rs74cp(zk+j 0isq rally accelerate much more slowly that automobiles?

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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.19: A 50 kilogram skater at rest on a frictionless rink k:biwpt.gdw 6l-j:e- throws a 2 kilogram ball, giving the ball a velocity of 10.0 m/s. We:g--bkpij:.dw lt w 6hich statement describes the subsequent motion?

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24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.13: An object near the surface of the earth with a weight of 100 newtonsgqu v: z5 fnz,uo3pb1, is accelz1u v:o 3 n,bgzuqp5f,erated at $4\;m/s^{2}$ . What is the net force on the object?

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25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  98.25: A car whose mass is 1200 kg is accelerated from re*r ou zi9lw(wx3 cj1p8lag: 7ost by a constant force of 2400 Nw j(lc79axi31w:gr* oopu8lz . What is the speed of the car 8.0 s after beginning?

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26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  98.32: A 3.0-kg block with initial speed 4.0 m/s slides across a rou sx28l:(yk59i j b3in vle9kingh horizontal floor before comikj2 ls v 9iixy8:3k(n9bnl5eing to rest. The frictional force acting on the block is 3.0 N. How far does the block slide before coming to rest?

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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.38: A block with initia11x cwl dy k;+gro2,hcl velocity 4.0 m/s slides 8.0 m across a rough horizontal floor before coming to rest. The coeffici;y2wx+ h do1r,glcc 1kent of friction is:

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.21: A 20.0 kg box remains at rest on a horizontal surface while a+ -4s 5x fzqzv3cwntt:3qquf1 person pushes directly to the right on the box with a force of 60N. The coefficient of kinetic friction between the box avc 4z1:uxntfftw q 53q z+q-3snd the surface is $\mu_k$ = 0.20. The coefficient of static friction between the box and the surface is $\mu_s$ = 0.60. What is the magnitude of the force of friction acting on the box during the push?

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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.16: A block initially moving at 8 m/s accelerates uniformly tomiyn gi9e0 8+:taj e ia*/3xlo rest on a horizontal surface. The block travels a distance of 12.0 m during the slide. Which one of the following choices best represents the coefficient of kinetic friction between the+ole3gy 9ai 0ta *ii/xjm8n:e surface and the block?

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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.21: A car of mass-ql7 c2kk as8r m slides across a patch of ice at a speed v with its brakes locked. It then hits dry pavement and skids to a stop in a distanced. The coefficient ol2a-8qs rkkc7 f kinetic friction between the tires and the dry road is μ .
If the car had a mass of 2m, it would have skidded a distance of

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31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.22: A car of mass m slides across a p 8.a5bvng r9c g7rk2fsatch of ice at a speed v with its brakes locked. It then hits dry pavement and skids to a stop in a distanced. The coefficient of kinetic friction betwe c a7gv frn.s98r5gk2ben the tires and the dry road is μ .

If the car had a speed of 2v, it would have skidded a distance of

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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.32: he driver of a car makes an emergency stop by slamming ofi 3r4wgvmn7 .sp m7y:n the car's brakes and skidding fpi3 rsgv7.7 mnw:4 myto a stop. How far would the car have skidded if it had been traveling twice as fast?

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.39: The driver of an automobile must carefull5:7 iuvu/xbdm2g3 :g x aap:lsy control each of the following devices. Which of these devices can cause /m b7pl5 2x:gvx:gudu a3:saian acceleration in a moving car?
(1) the break pedal ( 2) the gas pedal ( 3) the steering wheel

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34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.25: The net force on a rocket with a weight of 15000 newtons is 24000 newtonst) vo/ in on6a(1uzvs)m* gjm:. About how much time is needed to increase the rocket ’ speed from 12 m/s to 36 m/s near the surface of thzjs)6atv: o( o inm)/nuv 1gm*e Earth at takeoff?

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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.21: A box slides to the right across a horizontal hiol)(z5/ars floor. A person called Ted exerts a force T to the right on the box. A person called Mario exerts a force M to the left, which is half as large as the )o l5i ar(hsz/force T. Given that there is friction f and the box accelerates to the right, rank the sizes of these three forces exerted on the box.

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36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.27: The diagram beln qpcd- eb)i6sek 1q)6ow shows three roller coaster tracks of equal length. Assume thatpidq n) )q ebe6k-6s1c on all tracks the roller coaster carts start from rest at the same elevation and moves frictionlessly over the tracks to the finish.
If all roller coaster carts start at the positions shown, on which track would the roller coaster cart be traveling the fastest at the finish?

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37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.28: The diagram below shows three roller coaster tracks of equal length. Agplotjjj) mhj27. 502)g,f t1lnx dqdssume that on all tracks the roller coaster carts start from rest at the same elevation and moves frictionlessly over the tracks thn2 7g)5mo)p ljfddt1 qlxjjg.,0j2to the finish.
If all roller coaster carts start at the positions shown, on which track would the roller coaster cart reach the finish first?

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.29: Assume the rollercoaster cartrolls frictola,-p.c (wtlhjoy ,y cv.1j4 ionlessly along the curved track from point A to point C under the influence of gravity. What would be the direction of the cart's acc4ctyj1w (pc oyj h,l.vl- o.a,eleration at point



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39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.40: A box with a mass of 50 kg is dragged across the floor by a rope w 19ddhexb jkveam6 0)c7w0 lk5hich makes an angle of 300 with the horizontal. Which of the following would be closest to the coefficient of kinetic friction between the box and the floor if a 2xlkcj596a17wmedh 0) ev 0kdb50 newton force on the rope is required to move the crate at a constant speed of 20 m/s as shown in the diagram?



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40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.40: A 6.0 kg block initialn)44wwlhn3k aay-g:l ly at rest is pushed against a wall by a 100 N force as shown. Thecoefficient of kinetic friction is 0.30 while the coefficient of static friction is n3k a4wyag :nwhl-)l4 0.50. What is true of the friction acting on the block after a time of 1 second?


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单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.10: A homeowner pushes a lawn mower across a horizontal patch of g,dt* p8 umg.kwj31ktrrass with a constant speed by applying a force P. The arrows in the diagram correctly indicate the direc1jrpkg ukd8w* .tmt, 3tions but not necessarily the magnitudes of the various forces on the lawn mower. Which of the following relations among the various force magnitudes, W, f, N, P is CORRECT?


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单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.14: A book leans against a crate on a table. Neither 8/z iv m)(wvnqis moving. Which of the following statements concerning this situation is CORREiv/(m)8 qz vwnCT?


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43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.15: A crate of toys remains at rest on a sleigh as the sleigh id -1kyak5: uizirv+7gs pulled up a hill with an increasingvzkigk:a5-u 1ry+di7 speed. The crate is not fastened down to the sleigh. What force is responsible for the crate’s increase in speedup the hill?

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