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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Isha Lohan posted an Question
January 15, 2021 • 00:23 am
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30 points
30 points
- IIT JAM
- Physics (PH)
36. the moon is moving away from the earth at the rate of about 4 cm yr . ife denotes the total orbital energy of the earth-moon system and l denotes the orbita
36. The Moon is moving away from the Earth at the rate of about 4 cm yr . IfE denotes the total orbital energy of the Earth-Moon system and L denotes the orbital angular momentum then d 20 (a) dE 0 and >0 dE0 and b) dt dt dt dt dE (d) <0 and =0 dt dE (c) >0 and dt =0 dt dt
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Rohit kumar gupta Best Answer
For this situation the rate of change of total energy must me positive and angular momentum will remain constant that is rate of change of angular momentum will zero. Hence the option c is correct
can you please explain why change of energy must be positive?
Because moon and earth is a bounnded system and total energy of the moon is nagative to be in bounded system so to go away from the earth it need positive energy thatal is why rate of change of energy should be positive
hope this will helps to understand