Question

At what height above the earth's surface, the value of g is same as in a mine 80 km deep?

Answer 1

@sarah786

Answer 2

at height variation of graivty is
g '=g(1-[(2h)/R])
and in depth
g '=g(1-[d/R])
so
(1-[(2h)/R])=(1-[d/R])
where R= radius od earth
and d=80km(given)
you have to find 'h '.
calculate and solve


Or

it will cme like this...
g(1-2h/R) = g(1-d/R)
=> 1-2h/R = 1- d/R
=>2h/R = d/R
=> 2h = d
=> 2h = 80
=> h = 40 m
rest things are given above.....





Source: http://www.meritnation.com/

Answer 3

thankq @sarah786

Answer 4

you're welcome
but I just google'd it and I found all that , Did ya ???

Answer 5

noo i just popsted it directly..! :P

Answer 6

lol ok then :P