What is the gravitational attraction between you and the Earth if you are at 7.5 x 10^6 m from the center of the Earth and your mass is 90 kg?

Question

anonymous · Answer

@Data_LG2

perl · Answer

lets use newtons gravitational attraction formula 
$$ \Large F = \frac{GmM}{r^2}$$

perl · Answer

what is earths mass, and what is G ?

anonymous · Answer

whoops i forgot to add this but the mass of the earis is 5.98x10^24 kg

perl · Answer

ok thanks, and is G given, the universal gravity constant?

anonymous · Answer

nope but i feel like it would be 9.8 m/s

perl · Answer

nope, thats the acceleration of gravity near the surface of the earth

perl · Answer

we can look up 'universal gravitational constant'

anonymous · Answer

6.67x10^-11 m^3

perl · Answer

anonymous · Answer

whats next?

perl · Answer

$$
\Large F = \frac{GmM}{r^2}
\\Large F = \frac{6.67384 	imes  10^{-11}  \cdot 90 }{(7.5 	imes 10^6)^2}
$$

anonymous · Answer

then do i just simplify

perl · Answer

yes, i would use a calculator at this point

anonymous · Answer

okay! thanks so much for the help!!