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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 velocity rmv40y(* ekj7yb+ v tvl4 tds2is 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 n pr8nofs 6vy/p s5c3s)ot depend on the quantity of matter present. Which of the following propertiesso/ pn ps83 yc)vf65rs 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 the surface of the Earth. Assume t.gi8 y*eoir o b6s /a(jwdr,i;he Earth has mass*so y(; war bi.j6/odrgii, 8e $5.98 \times 10^{24} \; kg$ 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 isi(5nr ozxea,7 in free fall near the surface of the Earth. What is the magnitude of the gravitational force acting on thoa enrz7i ,5x(e 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 fob;j q7 f0(-iuxpco5 ahr an object’s velocity to increase while its acceleration decreas(c-uo0b; hp5ix qfj7 aes?

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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 erratic1hpboy4c3hno/z c 80 ruf.cx w 3fy20a motion. At every point in its motion, the direction oy8offpn03w h 0zob3h2r. 4yc xuac 1c/f 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 theeyu:9u*ggz p* air at the end of a string held by a person. The person pulls on the string uniformly accelerating the block upward f*9:uy*z ge gupor a short time. During this time, which one of the following choices correctly identifies the Newton’s Third 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 fo olq* y6)oc1i(rr da.vxws( 1vllowing situations is the net force constantly zero on th rasqwv .(oi(vc1 y1l6)d* roxe 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 person intervenes and sle++46hik n.tk5g pfcex5qz(:ivey; xows 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 magnitude of the object’s acceleration is a and the magnitude of the acceleration frkf+5 .zv4pq6xn5ei(+ tc; hixy e g:keom 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 equilibi: njhm 5;er r8eo miu-:8,xnqrium has three forces, F1 of 30 N, F2 of 50 N, and F3 of 70 N, acting on it. The magnitude of the resultanti,rr5 j-8nq :ehm i :nue8m;ox 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 newtons can be comoa23keh :: 4j:a lzxmebine to form a resultant with a magnitude of which of ejelaah ok4zm23:x :: 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 statemgb lbizf7bw 308:xo4tents is most closely associated with Newton’s Third Law o i3fbbbx4:gwt0 z7l o8f Motion?

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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 ac2 fgn7dp kr :b+i q9:clj2k.xgtion force 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 2 3wu)fb+,dx+o ngb4 qqm jk9cfloor of an elevator. The elevator is accelerating upward. Which one obj k,3gdmw)+f2q b4c+ 9qxuonf the following choices best represents the Newton’s Third Law pair force to the gravitational force 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 ds1n,um vp(f1d65kx hoownward through the air with constant speed. Which one of the following choices coxsn11 hdumk 6(5,ovfprrectly describes the Newton’s Third Law pair force to the air resistance acting on the skydiver 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 th20x s1kw)b : ovemlmg/rown by a pitcher with a speed of 35 m/s. The batterswings and hits the ball. The magnitude of ths)xk/m bml1o0e:w vg2 e 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 booki/k9oqx ;z/i. yryx7i is a calculator, also at rest. Which one of the following choices is the Newton’s Third Law pair force to the force that the table exyi9. ; //zoxk7x riyiqerts 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 Ph8j- twwgpslgpb087z(8r hmy5j ( jwh 6xpc 36rysics I class were in lab conducting an experiment related to Newton's Second Law. The collected data ws8- 6z t 85wp(bcr xyph7 j(wh 0r3lpgjgwj6m8ere displayed 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 sagou.d *dfkw:68- ng ojme time the mass of the object -gw6:.f8dkg o oduj*n was halved,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 mma8 :rtkqcae 7co u /4i)*+cvcass is 1500 kg is accelerated uniformly from rest to a speed of 20 m/s in 10s.t87*c v+:/co4ia mcarq ke cu) The magnitude of 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-trailecaux382: 1( 9qagy;qqj p zcsxr truck is traveling down the road. The mass of the trailer is 4 times the mass of the tractor. If the tractor accelerates forward, the force zsq:8cq jqg29(c1 ;pa ya3xuxthat 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 ln6u 0xznm3cf5pa 9 3tbarge tractor-trailer trucks generally accelerate much more slowly that automobilen5c3 630zbmaxf9n tpus?

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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 rlp6*gmg/ e0 z5 ad2f bpd8u*ssest on a frictionless rink throws a 2 kilogram ball, giving the ball a velocity of 10.0 m/s. Which stategppl2m 58sedu g*6b/ z*0asdf ment 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 hl o0()b u7+nedgp df,q5w4ii the earth with a weight of 100 newtons is accelerated at hion0,b 7l(4 iuew qf) pdd+5g$4\;m/s^{2}$ . 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 rest by a cons ci8z qi1z/843tsqshf tant force of 2400 N. What is the speed of the car 8.0 s afq3sqii/4f z8ztc1 s h8ter 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 n5pkh hvxk n-5 v4n07nslides across a rough horizontal floor before c5nv7 n xpk n0-hhkn45voming 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 initial velocity 4.0 m/s slides 8.0 m acrost cs(3 +jvkmg :a(/ qq.urp,4umc-ggcs a rough horizontal floor before coming/k +vjgmqt(r-c43m gu,qp c.cg( asu: to rest. The coefficient 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 /qzax3rs d;p- 2k yn-mremains at rest on a horizontal surface while a person pushes directly to the right on the box with a force of 60N. The coefficient of kinetic friction bqkm-rdnz3y2 -a;x sp/etween the box and 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 to re.,.s uk)zt+r ae,( 9e h/sdbw udkzw 5ehp+j2fst on a horizontal surface. The block travels a distance of 12.0 m during the slide. Which onjrhf5p.du ws e dewt )+ ( a.+zekhs9u,bz,k/2e of the following choices best represents the coefficient of kinetic friction between the 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 m slides across a patch or1 m uldhw+ l594v/8 1 iu-ol+qcmpmovf ice at a speed v with its brakes locked. It the+ioc 5+oul9dqv8mwmu411 p llr /hm v-n hits dry pavement and skids to a stop in a distanced. The coefficient of 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 acre. lizbn 5vh9ir54 i.boss a patch of ice at a speed v with its brakes locked. It then hits dry pavement and sk955.4 h in.bervbiliz ids to a stop in a distanced. The coefficient of kinetic friction between 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 eu*,l- l/ zpi4swj1fna car makes an emergency stop by slamming on the car's brakes and skidding to a stopwf1nls pj-e /4lu,iz*. 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 carefully control each of the followi-4b)a 24vd onm rzmv:ang devices. Which of these devices can cab2z 4voavm4-d)ra: mnuse an 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 newto*toh,dve*vnx+h -9cml.wu -mns. About how much time is needed to increase the rocket ’ speed from 12 m/s to 36 m/s near the do lm,u ch+t-vm*e nxwv*9.-hsurface of the 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 horizontalytwuk/3 b5- ha(bgnp gws29;w 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 force T. Given that there is friction f and the box accelerates to the right, rank the sizes of these three forces exerte95s;3wwggyahptw knu2/b-( bd 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 below shows three roller coaster tracks7y qawhxp/ )6ed5 37tq tadgfbzz9 96k of equal length. Assume that on all tracks the roller coaster carts start from rest at the same elevation and moves frictionlessly over the thtz63d /)dzq b a7ey9 6gp9kfawtq7 x5racks 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. Assuc8;w9lz, 7 fjcxj0cgjl2s qm*me that on all tracks the roller coaster carts start from rest at the same elevation and mm2qwj s *lccxcj9,g7l fz8 ;0joves 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 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 rollerc2,w bgkk2w/ mmoaster cartrolls frictionlessly along the curved track from point A to point C under the influence of gravity. What would be the dirg,w2mk 2/bk mwection of the cart's acceleration 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 ay 5jn:ko;+:h z sffi2z rope which makes an angle of 300 with the horizontal. Which of the following would be closji hkf;os2zy :z+n: f5est to the coefficient of kinetic friction between the box and the floor if a 250 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 initially at d9hlg.-lb/ tz +vc ajv(ihn(+rest is pushed against a wall by a 100 N force as shown. Thecoefficient of gd lhcjat/+vhl (-. nvz+(b9ikinetic friction is 0.30 while the coefficient of static friction is 0.50. What is true of the friction acting on the block after a time of 1 second?


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41#
 
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 horizontalp9 ht df- s2,c1-zsx ;w.onvoj patch of grass with a constant speed by applying a force P. The arrows in the diagram correctly indicate the directions but not necessarily the magnitudes of the variovwh- j f9s1o c-2,;dnsp.tzxo us 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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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.14: A book leans againstbd*p c9p4ii lb;n: 4pr a crate on a table. Neither is moving. Which of the following statements concerning;ipl9:*bipr4d b4 npc this situation is CORRECT?


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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 *d,tmuzv9accy5fa/ d 83x z;jx.iyk9remains at rest on a sleigh as the sleigh is pulled up a hill with an increasing speed. The crate is not fastened down to the sleigh. What force is restzy*zad;f9i xxv,j ayu 8kc. m 5/d3c9ponsible for the crate’s increase in speedup the hill?

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