Physics - Gravitation Question with Solution | TestHub
A planet is rotating about it's axis. The radius of planet is R and its mass is m. It has a geostationary satellite in equatorial plane at a height h from surface.
List - I | List - II |
|---|---|
(P) If the planet suddenly contracts without change in it's mass | (1) The energy of satellite decreases. |
(Q) If the planet suddenly stop rotating. | (2) The energy of satellite increases. |
(R) If the geostationary satellite is pushed in direction of motion to suddenly double the velocity. | (3) The energy of satellite remains same. |
(S) If the geostationary satellite suddenly detaches half of it's mass without any relative velocity. | (4) The satellite covers larger area on the planet. |
(5) The satellite does not remain geostationary. |
Options:
Answer:
Solution:
Analyze each sudden change before orbital readjustment.
Planet contraction and stopping rotation do not instantly change satellite energy but affect coverage/geostationary status.
Doubling satellite speed raises its energy and changes coverage/status.
Mass detachment without relative velocity leaves specific orbital energy unchanged.
The matching code is option B.
