1.

Find the height at which gravity becomes 25%

Answer»

EXPLANATION:

hey buddy.....

THANK you for question...

We have formula,.

g'=g/(1+h/R)^2

here g' is the acceleration due to gravity at the HEIGHT.

we know the values at surface of the earth...

g=9.8m/s^2

R=radius

h=height

g/g'=(1+h/R)^2

4=(1+h/R)^2

1+h/R=2

h/R=1

h=R

So the height of 6371 km the value of gg is 1/4 th of the original value

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