Question

The acceleration due to gravity at twhe surface of planet x is 10 what is the acceleration due to gravity at an altitude of 3000km

Answer 1

Answer:

For a planet x of mass m and radius r, the acceleration of gravity is gx = Gm/r2

Explanation:

If R is the radius of the Earth, r = 2R, and m is the same as the mass of the earth, then

gx = Gm / (2R)2 = (1/4) (Gm/R2)

Note that Gm/R2 is just the acceleration of gravity g on the surface of the Earth, so

gx = g/4 = (9.8) / 4 m/s2 = ? m/s2