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Class 11 NEET Physics Gravitation Questions
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© examsnet.com
Question : 42
Total: 83
A planet moving along an elliptical orbit is closest to the sun at a distance
r
1
and farthest away at a distance of
r
2
.If
v
1
and
v
2
are the linear velocities at these points respectively,then the ratio
v
1
v
2
is
(2011)
(
r
1
r
2
)
2
r
2
r
1
(
r
2
r
1
)
2
r
1
r
2
Validate
Solution:
According to the law of conservation of angular momentum
L
1
=
L
2
m
v
1
r
1
=
m
v
2
r
2
⇒
v
1
r
1
=
v
2
r
2
v
1
v
2
=
r
2
r
1
© examsnet.com
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