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When a satellite in a circular orbit aro...

When a satellite in a circular orbit around the earth enters the atmospheric region, it encounters small air resistance to its motion. Then:

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

Text Solution

Verified by Experts

The correct Answer is:
A, C
By applying work energy theorem change in K.E. =work doen by all the forces
`DeltaK.E=W_(g)-W_(f r),W_(g)gtW_(f r)`
Therefore `KE_(f)` increases due to the torque of the air resistance its angular momentum decreases therefore A, C
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