Answer:
Here, mass of each star, M =
Initial distance between two stars,
0s
Initial
potential energy of the system
Total
K.E. of the stars
where is the
speed of stars with which they collide. When the stars are about to collide,
the distance ;; between their centres,
.'.
Final potential energy of two stars
Since,
gain in K.E. is at the cost of loss in RE.
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