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习题练习:Newton’s law of motion



 作者: admin发布日期: 2024-07-30 13:02   总分: 43分  得分: _____________

答题人: 匿名未登录  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 tx3g xq -ezkmaedc wy2wl.8jjh+9:7d* he inertia of an object when its velocity 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 on(( r:qu8;s1fkadu nmf e that does not depend on the quantity of matter present. Which of theur 8mk:dnfu;(fs qa1( following 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 the surface of the Earth. Assum9ep :s eki87z s;a2hfxe the Earth has ma97z feiesp: s k;h28xass $5.98 \times 10^{24} \; kg$ 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 the Earth. Whatzom hdihymk7k51 e :28 is the mkkm y :zhdhm8o 12e57iagnitude of the gravitational 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 w ft-cikvv(f 5kn8b h*;o ,0ksfor an object’s velocity to increase while its acceleration kn*0wk f;f t v ,hci8o(sv5bk-decreases?

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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 ny q3f0:9tpkvo:ey- e undergoes erratic motion. At every point in its motion, the direction of the particle’s momen9ot3y pn :qv0eek:- yftum 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 heldx/u w(bd .6jbis h-a mwl/u.v1 by a person. The person pulls on the string umljub/h6d1ax.( w-/. bsvwiuniformly accelerating the block upward for 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 following situations is the net force constantly st wd sq1c0/x)cro;d- zero on01wr st/cd qco;-s)dx the 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 fallv n):hli xsfa+0v9p,rdfa5r7 close to the ground. A person intervenes and slows the object uniformly to rest. Which one of):09nai5h7a ,ldf pvsfx vrr+ 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 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 pcqcv 0-a1r5 ohv6x;6ga/z vxhas three forces, F1 of 30 N, F2 of 50 N, and F3 of 70 N, acting on it. The magnitude of the resultant ofF1 and F2gq 5rc0hc1za-vvx / vao66 ;px 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 forc+ u) -)) ihtg(ivgm4ku8war ate of 10 newtons can be combine to form a resu)riaiuu amt)g +vhg 8-(tk)w4ltant with a magnitude of which 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 stateme bk/jb dfy n4t01qa8lr2v5ch4nts is most closely associated with Newton’s Third fr qtcd45k 8h1n0/2lyvab bj4 Law of 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 action f,pp* .6w/hmet fsxh*p8.lhln orce 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. T,f-u1d ccfavknf 7/9z7qz uw1he elevator is accelerating upward. Which one of t 9fv7wzu f 1f7zu,c1cad-q k/nhe 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 downward through the air with constant speed. Which r z,wp.9 6,ayqizrdt.one of the following choices correctly describes the Newton’s Third Law pair force to the air ta , r6.yqd, 9irzzwp.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 thrown by a pitcher wi) lu4k,8zv(e3 h/fwn4td jto zth a speed of 35 m/s. The batterswings and hits the ball. The magnitude of the force that the ball exerts on the bat is a)4 zkn lhj(f/t 3,d etozuwv84lways

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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 book il9s +c ykh33hzs a calculator, also at rest. Which one of the following choices is the Newton’s Thir+z s3hlchy 39kd Law pair 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 I class were in lab conducting .63n7zl2pz8vs itl9)v 5nh qq* msh qvan experiment related to Newtolsnt8i vzqz 2q*mhlv3vs 7p)q9h 65n.n's Second Law. The collected data were 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 x(khh3m() a5pnhit.z were doubled while at the same time the mass of the object was halved,then the acceleration of the objecxmh)(h 5n 3hikpa(tz.t 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 accelerated uniformly from restdigvv-/ r7do7 to a speed of 20 m/svi d/vd-ro7g 7 in 10s. 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-trailer truck is traveling down the road. The mass of th;k7yvnxd2y7 c e trailer is 4 times the mass of the tractor. If the tractor accelerates ;7y72ynvcxk d forward, 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 explaincce - v ou47tg1iaqu8bkz9p3s0+w *fws why large tractor-trailer trucks generally accelerate much more t7u0wv8pizw+gokc- 4qbces*1a f u93 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 ri7l:e7ji -btqenq o di(isk,/w +r9ga(nk throws a 2 kilogram ball, givingeqisbg-nj9:w (i 7lr /ied +a7,tok(q the ball a velocity of 10.0 m/s. Which 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 earthw(o d9uzq+bq 5 with a weight of 100 newtons is accelerated z+wqdb (uqo59 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 rest by a constant force icp/ z0r5 0r3i 6coezxof 2400 N. What is the speedczo p0cix0r5 zi36/r e 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/gep)v8bafludz-bn,:)6 v e2 ys slides across a rough horizontal floor before coming to rest. The frictional force acting on afgpe 8due v-b)lvz) n26yb,: 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 acrosh 4s8sue . *xlwvp8a4xs a rough horizontal floor before coming to rest. The coefficient of friexvs4.8lpwua *48hxs ction 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 c zx 3-ca8uv,bjz23:r-jo 1lzcw3mwsg e-iy .horizontal surface while a person pushes directly to the right on th eo3c8u1,wyz3 z.slgj -:- caiwjr3c z2 vbmx-e box with a force of 60N. The coefficient of kinetic friction between 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 rest :,r (f nof-/jee,jhw8,dihlg 6 sx hz(on a horizontal surface. The block travels a distance of 12.0 m during the slide. Which one of the frhh,x d-/o f,wz l,6j:(e8 i(hfgsenjollowing 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 of o lmstifr;icq-99bw4l 2 9)pvice 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 fri4ivs9fq;cpw-9 m it9l)lob2rction 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 patch of)g./xzfdwxuh9g e5 4u ice at a speed v with its brakes locked. It then hits dry pavement and swuhu 95zfeg/gx.) dx4 kids 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 a car makes an emergency stop by slamming on the car's brakeb( 8m4 pggdfv:s and skidding to a stop. How far would the car have skidded if it had been traveling twice afm bd:v4g(8pg s 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 contk+um, aan5 1oqf.jp7+x7gblrrol each of the following devices. Which of th p,gxjlm b .ora+kn775ufq1+aese devices can cause 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 ar u dd)g7cqkk4uw58 .ct9pm l4 weight of 15000 newtons is 24000 newtons. About how much time is needed to increase the rocket ’ speed from 12 m/s to 36 m/s near the surface of the Earth kq k.4uc5m48 rld) 7wtgpd9ucat 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 horizz1xgf -1wryn6mji)oq 3 9uts )ontal 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 i)y- )roujmt zs16fxng9qi31 w s 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 below shows three roller coaster tracks k9(m59 vjmzc jv,c;wt8hi/doof equal length. Assume that on all tracks the roller coaster carts start from rest at the same elevation and moves frictionlessly over the oik(m;v9j vzdm 9 c5c8w/j h,ttracks 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 lrptr(jc3 :dm z:yjh//ength. Assume that on all tracks the roller coaster carts start from rest at the same elevation and moves frictionlessly over the tracmzty: p/ rhd (j:crj/3ks 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 rollercoaster cartrolls frictionlessly along the curved tra l;5y1 sumqy1hck from point A to point C under the influence of gravity. What would be the direction of theq;lu 5yymhs11 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 a rope gbqug*v 9jq y6-k/ v8 b7i4scdwhich makes an angle of 300 with the horizontal. Which of the following would be close-qc7b*ivqgdb9 g8 v4u/6 jsyk st 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 y t*5jvn:)bwdepli) 2n s(cu8at 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 n82(vdtuc5pwne lsy:*bi )j)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 horizontzt:kxc8g /3;lgb u.kial patch of grass with a constant speed by applying a force P. The arrows in the diatx 8u;izl kcb/:.k3 gggram correctly indicate the directions 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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42#
 
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,5/nc rdtl1hj is moving. Which of the following statem/n hj lrd,c1t5ents concerning 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 remains at rest on a sleigh as the sleigh is pw:r8q x.fuyv0 ulled up a hill with an increasing speed. The crate is not fastened down to the sleigh. What force is responsible f0w.xfur8vqy :or the crate’s increase in speedup the hill?

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