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习题练习:Gravity and Planetary Motion

 作者: admin 发布日期: 2025-09-14 23:04   总分: 22分  得分: _____________

答题人: 游客未登录  开始时间: 24年08月17日 16:00  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  
  08.19: Kepler’s Second Law about “sweepixw y::ojq b)4jng out equal areas in equal time” can be derwyobj: x4jq:) ived most directly from which conservation law?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.17:“All planets in the solar system followkiuw-b u57l 4w elliptical orbits with the Sun located at one fl kuu4bw-75wiocus of the ellipse.” This statement is best summarized by which one of the following choices?

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.21: What happens to the forc +plqj1ui5w-p e of gravitational attraction between two small objects if the mass of each object is doubled anlq+w1-p pi5 jud the distance between their centers is doubled?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.09 Two spherical bodies attract each other with a gravitatnvvg;zovb - ;j7 um46as .)ty-fo o0qaional force of 4.0 N. What will be the fo b; );matvq-76a-vz0yognjo f sv .u4orce if the distance between them is doubled?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  14.27: Two spherical, non-rotating planets, X andY,nn -g9*1yb(kafr mgga a5*l1 q have the same uniform density. Planet X has twice the radinkn mg*gfa qr*51yaba-g (91lus of Planet Y. Let $g_x$ and $g_y$ represent the accelerations due to gravity at the surfaces of Planet X and Planet Y, respectively. What is the ratio of $g_x:g_y$?

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.46 Two spherical, non-rotating planets, X and Y, have the same uniforlmk .aoi4u )r)(gee +bm density. Planet X has twice the radius of Plau+a)gk e er.b(om il)4net Y. Let $v_x$ and $v_y$ represent the escape speed at the surfaces of Planet X and Planet Y, respectively. What is the ratio of $v_x:v_y$?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.16: The mass of a planet can be calculated if it is orbited isc-y pd346 ooby a small satellite by setting the gravitational force on the satellite equal to the centripetal force on the satellite. Which of the following w3oo6c s4-piydould NOT be required in this calculation?

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.11: Assume that the Earth attracts John Glec7qg t+s0d*ua9evc 9w nn with a gravitational force F at the wcsqu7dgc9*e9+ at v0surface of the Earth. When he made his famous second flight in orbit, the gravitational force on John Glenn while he was in orbit was closest to which of the following?

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  14.30: Considering only the Moon-Earth system (ignomd:tz2pb l-xc99v c u4re any influence of the Sun), which one of the following best expresses the magnitude of the Moon’s acceleration about 4x2c99luz-m: v tpc bdthe Earth?

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.19: As a rocket blasts away from the earth with a cargo foe-t bgiy2d:vw+k39q5jg n wx;/pc w0s r the international space station, which of the following graphs would best represent ttwbw+ex5y3v k:/;dwg j290- i qpns cghe gravitational force on the cargo versus distance from the surface of the Earth?


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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.33: One object at the surface of the Moon experiences gw mh r,.:bmexm g :euk33t7s7the same gravitational force as a second object at the sur. 3sw,:kg3g :7u m7hetxrme bmface of the Earth. Which of the following would be a reasonable conclusion?

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.24 Consider an object th( ,3c,arzp.vx )wgfw gmc5*wx at has a mass, m, and a weight, W, at the surface of the moon. If we assume the moon has a nearly uniform density, which of the following would be closest to the object’s mass and weight at a distance halfway between mxgc, z.p,*c5fwxa) w(3wvrg Moon’s center and its surface?

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.23: A hypothetical planet has seven times tpj7be 3 l;,xf6tplfb0xv5k h6he mass of Earth and twice the radius of Earth. The magnitude of the gravitational acceleration at the surface of this planet is most nearl3lpp;x7b,ffjx6t lke50 b6v hy:

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  98.24: A planet has a radius one-half that of Earth and a mass one-fifth the Eat73vix n )g3iurth’s mass. The gravitational ) tuxv337 iginacceleration at the surface of the planet is most nearly

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.38: Akg 1200 satellite orbits Pla0 )6qqs0ontr qnet X in a circular orbit with a constant speed of 5,000m/s. The radius of orbit is 7,500,000 m. What os6r)q0t0qn q is the magnitude of the gravitational force exerted on the satellite by Planet X?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  94.34: A hypothetical planet orbits a star with mass one x/mpk/a 0gbe9-half the mass of our sun. The planeex 0k/mpa/ gb9t’s orbital radius is the same as the Earth’s. Approximately how many Earth years does it take for the planet to complete one orbit?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.12: Two artificial satellites, 1 and 2, ared:qfj i8 j( */f ppj05dk-/rdy6a rfcu sr+0fp put into circular orbit at the same altitude above Earth’s surface. The mass of satellite 2 is twice the mass of satellite 1. I50/p/ 0+ipcjjk*fr- ydas6(fd: jp fq8druf rf the period of satellite 1 is T, what is the period of satellite 2?

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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.22 Satellite 1 makes a circular orbit around the Earth with je/; z 3sgdfj id1iu*tjk/ .x61id3oma radius $r_1= R$. Satellite 2 makes a circular orbit around the Earth with a radius $r_2= 2R$. We let v represent the speed of a satellite and a represent the magnitude of a satellite’s acceleration. Which one of the following choices gives the correct relation between the speeds and accelerations of the satellites?

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  98.33: In the following pcd /kju,g 81horoblem, the word “weight” refers to the force a scale registers. If the dj1,o/ gukhc8 Earth were to stop rotating, but not change shape,

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.42: A comet moves in andb t3 (c2.,zs g,rcbablk68w f elliptical orbit around the sun. As the comet moves from aphelion (the point on fz.sgb6bw(k tccl ,rb32,d 8athe orbit farthest from the sun) to perihelion (the point on the orbit closest to the sun), which of the following results is true?


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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.48: In the binary star system shown, the two stars fom p0gn2oir+8f vds4 j/llow circular orbits about the system’s center of i j/dgnvop8r4m 20fs +mass. The stars are separated by a distance D that is large compared to their size and are subject only to their mutual gravitational attraction. The orbital period of the star of mass M is T. Which one of the following choices represents the total mass of the binary star system?


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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.50: A rocket is in a c6e mi3.k6h tikircular orbit with speed vand orbital radius R around a heavy stationary mass. An exte.6ite 6k k3ihmrnal impulse is quickly applied to the rocket directly opposite to the velocity and the rocket’s speed is slowed to v/2, putting the rocket into an elliptical orbit. In terms of R, the size of the semi-major axis a of this new elliptical orbit is

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