11g'= 2GM/R2= 2g
h= 0+ 1/2.g'.t2
Thus, t= √h/g
Hope i'm not wrong. :)
A body of superdense material with mass twice the mass of earth butsize very small compared oto the size of earth starts from rest from h<<R above the earth's surface. It reaches earth in time
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186 Answers
11
3hey aragorn the same thing was done by me. your ans is wrong. the answer is √2h/3g
3ok here is the solution
They will meet at centre of mass.the masses will meet at a height of h/3
s=1/2gt2
and t=√2h/3g
3Aragorn sorry for the 14. i have mistyped that one. and can u explain me why is ur soln is wrong
11Thalaiva, if h<<< R, how will center of mass be h/3?
TRANSLATION FOR NEXT POST:
I'm not able to understand what u're saying. please explain what's the relation between position of center of mass and the condition h<<R
3what is the relation between the center of mass and the condition h<<<R. reply me
3Ram kumar i m sure it is a question in mtg which was published by momentum academy
11Ippo..........rendu massukkum nadula distance h irundha h/3 is correct. But rendu massukkum nadula distance h illaiye, R+h (≈R) dhane?
FOR THIS POST:
Now, h/3 will be correct if the distance between the masses is h. But the distance is R+h (≈R).
FOR NEXT POST:
It's given in the question that the distance between the masses is h
3why do u take the earth to be stationary. they r under mutual gravitation
11distance between masses doesn't matter. Distance between center of masses is not h.
About taking earth is stationary: MY MISTAKE, SORRY
3aragorn i accept that my soln is wrong because the center of mass is not h/3 from the center of the earth . I think our soln is also wrong because the earth will move . So can u provide me a correct soln
3the center of mas will be at a distance of R/3 from the mass 2m . will the mass will go inside the surface of the earth
3ram kumar thalaivarey neenga correctuthan. i have one doubt what is the reason for the two masses to meet at the center for mass
1i didn say dat two centres ll meet......... i said they r separated by a distance R.........
3i think the given pbm cant be solved we have to consider the type of collision.Am i rite aragorn and ramkumar