Gravity and Planetary Motion - 无忧得胜-网上国际课程 (5edu.win)

1#

08.19: Kepler’s Second Law about “sweeping oubja 8,h( 5gqvit equal areas in equal time” can be derived most directly from which conservation law(5baigh,qvj 8 ?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

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 follo;omh69 kt5*uie u,jh9x tf)ih w elliptical orbits with the Sun located at9)hi;hu9*ktih u5mjfoxe ,6t one focus of the ellipse.” This statement is best summarized by which one of the following choices?

A. Kepler’s First Law

B. Kepler’s Second Law

C. Newton’s Universal Law of Gravitation

D. Einstein’s Law of Gravity

E. Schwarzchild’s Law of Orbits

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

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 gravitationbutuk * zfdz.j4 :5zt)al attraction between two small objects if the mass of each object is doubled and the distance between their centers is db u4.zdz:f )zu*t5jktoubled?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

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 gravitational force of 4.0 3fs b9nawfi yh:;ap13bf0x4qN. What will be 13i0 3fnybaa:sxfwf 94pq ;hbthe force if the distance between them is doubled?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

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, have th30q f4qiehsd(e same uniform density. Planet X has twice the 0h sifqdeq43( radius 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 $g_x:g_y$?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

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 701 nu 4tfbnigtekk)*9n agu0 the same uniform density. Planet X has twice the radius of Planet Y.)u u *tt n900fgbk741ekin gna 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 $v_x:v_y$?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

01.16: The mass of a plan;f2,q ukkz( onet can be calculated if it is orbited by a small satellite by setting the gravitational force on the satellite equal to the centripetal force on the satellite. Which ofkk(,nfo qzu;2 the following would NOT be required in this calculation?

A. the mass of the satellite

B. the radius of the satellite's orbit

C. the period of the satellite's orbit

D. Newton's universal gravitational constant

E. all of the above are required for this calculation

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

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 with a gravitaslkx9/ oz5fe)que z7 a*,sgb3 tional force F at the surface of the Earth. When he made his famous second flight in orbit, the gravitational force on John Glennoxf9s3gz 7l*q/uk,b ae5ezs) while he was in orbit was closest to which of the following?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

9#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

14.30: Considering only the Moo31ki2i xhzhg ,g j+*esn-Earth system (ignore any influence of the Sun), which one of the following best expressesk s+ gxgzijh1i,3e*2 h the magnitude of the Moon’s acceleration about the Earth?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

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 wh ph0 t95a w/b7ghjr2vith a cargo for the international space station, which of the following graphs would besrhpwh25bj a7 9v0/htgt represent the gravitational force on the cargo versus distance from the surface of the Earth?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

11#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

99.33: One object at the * 0 w*qy1pioodlab(k8surface of the Moon experiences the same gravitational force as a second object at the surface of b y(*o081 dalowkqp* ithe Earth. Which of the following would be a reasonable conclusion?

A. both objects would fall at the same acceleration

B. the object on the Moon has the greater mass

C. the object on the Earth has the greater mass

D. both objects have identical masses

E. the object on Earth has a greater mass but the Earth has a greater rate of rotation.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

12#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

00.24 Consider an object that has rj .:ux 9wk 9yz2c*; qqdxa5blieq1)ha 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 wouldd zbw:q95 qckra )9y.xejqhl1 i2*; xu be closest to the object’s mass and weight at a distance halfway between Moon’s center and its surface?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

13#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

96.23: A hypothetical planet hapi99a0 kr7pg .lp6ffdtc+dd . s seven times the mass of Earth and twice the radius of Eat06lpcd9ipd +fk7 f.rp. agd9rth. The magnitude of the gravitational acceleration at the surface of this planet is most nearly:

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

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 aejhk + zvd p)s2ww*r12 mass one-fifth the Earth’s mass. The gravitationalwdhres +)jp*wk2 1 vz2 acceleration at the surface of the planet is most nearly

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

15#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

08.38: Akg 1200 satellite orbits Planet X in a circular orbit with a conzfhjro .9 n1c)stant speed of 5,000m/s. The radius of orbit is 7,500,000 m. What is the magnitude of the gravitationaln)1o rzfj.ch9 force exerted on the satellite by Planet X?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

16#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

94.34: A hypothetical planet orbittvmz6kf8)4 *)rt e1gxs5bgxvs a star with mass one-half the mass of our sun. The6v) s zfertv4t1 b*g )8g5xmkx planet’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?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

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 io(:-r tmd juj2nto circular orbit at the same altitude above Earth’s surface. The mass of s(m:ut d oj2-rjatellite 2 is twice the mass of satellite 1. If the period of satellite 1 is T, what is the period of satellite 2?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

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 radius aj xb+bb7 6* * (trvt :*tuuhklfhru//$r_1= R$. 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?

A. $v_2=\frac{1}{\sqrt{2}}v_1,a_2=\frac{1}{4}a_1$

B. $v_2=\frac{1}{2}v_1,a_2=\frac{1}{4}a_1$

C. $v_2=\frac{1}{\sqrt{2}}v_1,a_2=\frac{1}{2}a_1$

D. $v_2=\frac{1}{2}v_1,a_2=\frac{1}{2}a_1$

E. $v_2=v_1,a_2=\frac{1}{2}a_1$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

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” refers to the br;;b.9q mdmo force a scale registers. If the Earth were to stop rotating, but not q omb;rm.db;9change shape,

A. the weight of an object at the equator would increase.

B. the weight of an object at the equator would decrease.

C. the weight of an object at the north pole would increase.

D. the weight of an object at the north pole would decrease.

E. all objects on Earth would become weightless.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

20#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

10.42: A comet moves in an elliptical orbit aroundxebn rp.2o(zt644qf/zkf;,kp 0khdb the sun. As the comet moves from aphelion (the point on the orbit farthest from the sun) to perihelion (the point on the orbfq bh;b,2p ed/0rxpz(f6k4z4ok.ntkit closest to the sun), which of the following results is true?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

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 follo1h 7:/rbo)xp:lz: ex ask.eydza nc.. w circular orbits about the system’s center of 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 mx :.dly b 7o.1ez: cxa/shnaz )rke:p.ass M is T. Which one of the following choices represents the total mass of the binary star system?

A. $\frac{π^{2}D^{3}}{5GT^{2}}$

B. $\frac{4π^{2}D^{3}}{5GT^{2}}$

C. $\frac{4π^{2}D^{3}}{GT^{2}}$

D. $\frac{16π^{2}D^{3}}{5GT^{2}}$

E. $\frac{25π^{2}D^{3}}{4GT^{2}}$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

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 R around 1z 4cg9x ;be gn+y 6z8+(quejo8cygjs a ++sxgb g; un4eqz(yej1 cj6 98go8yzcheavy 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 terms of R, the size of the semi-major axis a of this new elliptical orbit is

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

账号		自动登录	找回密码
密码			立即注册

网页聊天 (离线可收发)

加微信咨询 (申请一对一课程辅导，加本站学习交流群）

电话咨询：

联系管理员：

查看帮助：

未使用图片

本次作答已使用