GravitationMedium
Question
When a satellite in a circular orbit around the Earth enters the atmospheric region, it encounters small air resistance to its motion. Then
Options
A.Its kinetic energy increases
B.Its kinetic energy decreases
C.Its angular momentum about the Earth decreases
D.Its period of revolution around the Earth increases
Solution
By applying work energy theorem change in K.E.
= work done by all the forces
ᐃK. E. = Wg - Wfr ; Wg > Wfr
therefore KEf increases due to the torque of the air resistance its angular momentum decreases therefore A, C
= work done by all the forces
ᐃK. E. = Wg - Wfr ; Wg > Wfr
therefore KEf increases due to the torque of the air resistance its angular momentum decreases therefore A, C
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