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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 “sweeping out equal areas inbar rohe:)2s9m +hou1;bv 5mm equal time” can be derived most directly from which consees a2b59;om)uh o m1hvbr:m+ rrvation 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 cxksh/pm47 zi ez5)g6 solar system follow elliptical orbits with the Sun located at one focus of the ellipse.” This statement is best summarized by which one of /mi)sx c4ph zkgz 5e76the 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 force of gravita07irkf c9 +gyytional attraction between two small objects if the mass of each object is doubled and the distance between k9ri7 y +ygc0ftheir 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 withi-7m g q 7qo uk)+z,rnv i:.hdq-nduw- a gravitational force of 4.0 N. What will be the force if the distance between them ii d:-nhz-iw-7u. n+ur,qqdqmkg )7vo s 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 kfz gu(*jk (q2v)0ysi planets, X andY, have the same uniform density. Planet X has twice the radius of Planetvq* )sji2kuzfy( gk(0 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, nopl0 ooktwt1;5sbq 1 ,ee;tz)ht( b k;dsn +u7dn-rotating planets, X and Y, have the same uniform density. Planet X has twice the radi1pttq5+0 h1;se ,bwol(kdt7zk dt n;euo;)sbus of Planet 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 islp75qw81/q7i gvm cw oiep+u:13kc uf orbited by a small satellite by setting the gravitational force on the sato:q cf v13iwcm5piuk7ule/81w gq7+pellite equal to the centripetal force on the satellite. Which of the following would 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 Glenn withgkgjq 2l(8ed 4 a gravitational force F at the surface 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 2el gq8dj g(4kthe 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 (ignore any influence of the Sun),kk 53eltrq ( *la1rwl8 which one of the following best expresses the magnitude of the tkrrlq8(3l*15 aek lwMoon’s acceleration about the 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 ea ,xabm x9a6p4lrth with a cargo for the international space station, which of the following graphs wo9 4pa,mabxxl6uld best represent the 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 experiencm5 fyd .u8.j++thvxk bes the same gravitational force as a second object at the surface of the Earth. Which of the following would be a reasvhm.x.t d 8ub+j5k+y fonable 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 tha.g6ho qql:bgq :w-+)f rept b5t has a mass, m, and a weight, W, at the surface of the moon. If w .65q-gbpqlqow) fghe:+ rb:t e 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 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 ha bsws1+t4yvb 3s seven times the mass of Earth and twice the radius of Earth. The magnitude of the3y 1wsbs t4+vb gravitational acceleration at the surface of this planet is most nearly:

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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 o c5r;gnl) )b/hg8rscd ne-fifth the Earth’s mass. The gravitational acceleration at the surface of the pg r8b gslrdc)c5nh/ ;)lanet 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 satelx-y6 e x 9ndqmgxr-1jia(cu4;lite orbits Planet X in a circular orbit with a constant speed of 5,000mixrgq;ayx (n - 1jdxmec- 6u94/s. The radius of orbit is 7,500,000 m. What 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 onlpp9nrd7+8s (o cy,cve-half the mass of our sun. The planet’s orb pdp+r7cl os89 ,vnyc(ital 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, are put into /fbls 6-*aswucircular orbit at the same altitude above Earth’s surface. The mass of satellite 2 is twice the mas* /aflsu-6sb ws of satellite 1. If 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 a radif+ycvwh p4 x0lj+oq s-i3;q/ivnc3d* us $r_1= R$. 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 problem, the word “weight” refe(jrvxflti dqn(z +np g3 8..v6rs to the force a scale registers. f8vd nr x lp +36njviz(qt.(g.If the 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 an elliu5my+ll -w4) j7qxhavma* ;noc) t;mfptical orbit around the sun. As the comet moves from aphelion (the point on the orbit farthest from the sun) to perihem m otu+7haa)njf-*;)5 xly4 wmqcl ;vlion (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 gidp;x fk ;f* r,rr)3ltwo stars follow circular orbits about the system’s center of mass. The stars are sepa;rrl fif*k )dr;3gx,p rated 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 circular orbit with speed vand orbital radius l s3g ;gw x6chzp*og1tla5b() R around a heavy stationary mass. An external 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 t(w z h c*6b15;stpax )gl3loggerms of R, the size of the semi-major axis a of this new elliptical orbit is

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