A planet has twice the mass of Earth and twice the radius of Earth. The free-fall acceleration on this planet is equal to what?
g is proportional to mass and inversely proportional to radius of the earth
g would
be
gearth/gplanet = m/r2 *
(2r)2/2m
So gplanet = 1/2 * gearth = 0.5 * 9.8 = 4.9
m/s2(ans)
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