$Lr-.rno4g
Gravitetion problems from prior exams:
Di期
拝
視
得蠅l蔦 滅
驚l轡鮒
ぷ
電
構勇
機ま
脚鸞堪
Moon B is closcstto
6s
→ ■6x Ю
RA■
⑩・ 9Xが S
3詢 ♂ m
R3・ 3,9kl♂ 臥
五 響 刈Dち s
T・ ど 't
に
十
日
i五 主
｀
｀■三
o■
ぽソ1画 fぶshぁ
mlザmSTmlS“
口
掘
3xЮ
[。
l守
mJn∞
麟
雛霧 理
:″ lノ
=あ
い)V=4LIFJEI
θ
b) ツノ=2ッ 。
3)
m me
ettsド d」 cヽ
%ミ 仁
ぬ り,
%
T. Vi゛ 社 皇
R; = 2Po
■
A drome weighs 50 stobes on its home planet ofNedrom. It travels to a new planet,
Xarxes, that has 3 times the mass and 5 times the radius of Nedrom. How much does
the drome weigh on Xarxes? Explain your reasoning below (A stobe is a unit of
weight; no conversions to familiar units are necessary for this problem.)
l8
stobes
6 stobes
150 stobes
C)
83 stobes
堰
蝋凛 躍
=
■、ニ郷
- !L)
-
(R、
レ
ヽ
い
彎謳墨
マ寸
stcos:
こ
o
-
は計
ヽゝ= (inOXMり
L卜
l-
ｆ
ン
。
崎
一
ユ
輌
回
30 stobes
一
“
tantp,■
Two planets move around their Sun. The first one is twice as massive and three times farther
from their Sun than the second one. Compare their periods-
(geca--$ -P".-
a)
Tr=3Tz
b)
Tr={3T2
r,:ri:r,
Tr:9{3T:
，
e)
)'こ
う πτ3F■
こ
't F27Tz
二一
一
d)
(Iギ
→
い
ぼ
CD
R-5
A geosynchronous orbit (period = I day) has a radius of 4.22 x 107 m. Suppose we want a
satellite to revolve around the earth 4 times a day. What should the radius of its orbit be?
c.
2.1I x
d.
e-
l.4l x l07m
2,03
x
R、 こ
1、
lt♂
l07 m
CIA\S
r\ t-=7.
107 m
ｔ
︲ ′
ヽ 、
Ｌば
一
´
R2
´
.■
L<
Rl
￨、
マッ
も
￨∫
上十
m
O,
二
b l.01x lげ
-I1-=
Ｌ ■、
一 一
67x107m ｀■DAv
∈ヽ■
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