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 outesm8 r 0r6a(qx equal areas in equal time” can be derived most directly fe(8 a6xmrq 0rsrom which conservation law?

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 follow ellipticavn : :iefw(b)u hu*ic9dc/.efl orbits with the Sun located at one focus of the ellipse.” This statement.d*cub vw c i fe:nih9u(:f/)e 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 te 84eqawme;b- ayylb- amv* v;*9uwe5 he force of gravitational attraction between two small objects if the mass of each object is doubled and the* q;wv-yb-e mv4b aaw*85l emuyae9;e distance between their centers 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

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

4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

95.09 Two spherical bodies attract each othernoxptosm2 *x 2)f/xn4uu die cj(/);x with a gravitational force of 4.0 N. What will be the force if the distance between themnfmu)ui2*x x4p;o2n d(ct// osex) xj 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 thev/.5zme quy;( oqz*.3vado ev same uniform density. Plm3u (ve5qvy/v zoq* ;zde.oa.anet X has twice the 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

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

6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

16.46 Two spherical, non-rotat50 hiw-koo/ nning planets, X and Y, have the same uniform density. Planet X has twice tn oo5k0-h ni/whe radius 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 $v_x:v_y$?

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

7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

01.16: The mass of a planet t,np y.+dbdw u46)ryr.v5xbw++oyhv1zs 6 qw 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 of the following would NOr +wqhr.z wp.y,+) buwxd +bsn6ov56ty4dv1y T 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

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 Eartqyt ( /z+4wendnui0p o ep.30ss7 :;wggvfjm)h attracts John Glenn with a gravitational force F at the surface of the Earth. When he made his famous second flight in orbit, the gravitationa.i0;f/ v7pwt 4 wyn)us(m3qd+ogszg npe e0j :l force on John Glenn 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 Moon-Ea:cwc zkhr/d / 2m0/ftarth system (ignore any influence of the Sun), which one of the following best expresses the magnitude of the Moon’s ad :kf0 m2zr/h/tc/ac wcceleration 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 with a cargo for tn,a9 guxmx qxed9 .9k1he international space station, which of the following x eu.g9xm9nxdq ka,19 graphs would best 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 surface rsul+z 3kysapy t17em5-w)fq-: 4yi fof the Moon experiences the same gravitational forasp kwr 7 us1qff 43myy5--+l):zteyice as a second object at the surface of the 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 a mass, m, and a weight, W, at the surface xu z c3x.s jg-yp)0)vgof the moon. If we assume the moon hu0) jg3xsyzv.pc )g-xas 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?

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

13#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

96.23: A hypothetical plai .uknc gxrly-4 5vt;;net has seven times the mass of Earth and twice the radius of Earth. The magnitude of the gravitational acceleration at the surface of this planet is m-y;.c i4;vglt nkx u5rost 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 o2kyes g jzrw1atk5 y9 m pwcq 1.jc-b/k55t/(bne-half that of Earth and a mass one-fifth the Earth’s mass. T/1 yw jm/ (-9. 1by kprgczs5ktqkb5cajte5w2he gravitational 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 orbil *5 x;4 uuee*hcqd6,yidla6d ts Planet X in a circular orbit with a constant speed of 5,000m/s. The radius of orbit is 7,500,000 m. What is the magnitude of the gravitational force exertedud hx*4aqe;ylei,l6u6d5 dc * 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

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 orbits a star i8v9p1) /jh0fa 5logaxisk/u w2ak4 nwith mass one-half the mass of our sun. The planet’s orbital radius is the same as the Earth’s. Approximately how many Earth years does it take for the planet to completex/405h8 /vifiu j9p2ago1sn wkak) al 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 y1r ;(njwiv i9a6s/fk yhg6i4 and 2, are put into circular orbit at the same altitud;aikvwfiisn16 4hy9 j/rg (6ye above Earth’s surface. The mass of satellite 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 circwla; eenj1c9 +ular orbit around the Earth with a 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?

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,qu1t4u 0bjoe : the word “weight” refers to the force a scale registers. If the Earth w jteo bq1uu40:ere to stop rotating, but not change 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 around the sun. As the comet movesqynkfim1a7 d-z v j4;s+l8y9x from aphelion (the point on the orbit farthest from th;y+df 8j- 9z qnmi7yk al4xvs1e sun) to perihelion (the point on the orbit 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, h jxv,m7o44hqmyn 1(wthe two stars follow circular orbits about the system’s center of mass. The stars are separated by a distance D that is large compared to theirym(m v41ho4j7h x,wnq 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?

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

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 ci:* c 7lb;w b61kxmobm0smunb:6p z g4drcular orbit with speed vand orbital radius R around a heavy s;bb* gub::dn b7lmos6cm mzxp014 6 kwtationary 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