What would we look like if the earth was twice its size?

Question

i have wondered this for a while when i mean twcie its size i mean twice the gravity aswel.

Answer 1

since gravity is based on mass and volume,

to get 2 times the gravity, the earth only needs to be 1.26 times bigger, because the volume of a sphere is

V=4/3pi r^3

2 times the volume is

V=4/3pi ((2r)^3)= 4/3 pi ((1.26^3)r^3)

if the earth was twice its size, gravity would be

2^3 or 8 times more.  check out the gravity of Jupiter and earth.

Answer 2

i don't think our appearance would change with the earth

Answer 3

twice as big

Answer 4

I'm pretty sure we'd be half the size, or at least weight that we are now, but we'd have more bone mass?

Answer 5

shorter, heavier leg bones if we were standing upright, which is a maybe because of the energy it would take to overcome gravity... or we'd have huge strong muscles that helped us stand up..... very strong neck muscles and a shorter neck to hold up the head against gravity.... prob a lot like the early man.....