Question

NEET PHYSICS CLASS 11
Plz solve the question in attachment ASAP.....
(answer with solution)​

Answer 1

Answer:

We know that Gravition potential is

Work done in bringing Unit mass at distance r from infinite distance .

Now effective mass is only which is inside pseudo sphere . For example if you want effective mass which will apply force at distance 3r then draw a imaginary sphere and see which mass is inside .

So

From infinite to 2a effective mass is 3M , from 2a to a M and a to 0 it is 0 .