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Standard XII
Physics
Newton's Law of Gravitation
A comet orbit...
Question
A comet orbits Sun in a highly elliptical orbit. The comet has a constant
A
Speed
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B
Angular speed
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C
Angular momentum about Sun
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D
Potential energy
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Solution
The correct option is
C
Angular momentum about Sun
Torque about Sun is zero.
τ
=
d
L
d
t
but force passes through Sun hence
τ
=
0
s
o
,
L
=
c
o
n
s
t
a
n
t
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