[ Bad news is whatever you weigh now would be multiplied by 4.5 if you stepped out on that planet. If you weigh 180 pounds on Earth, you would weigh 810 pounds on that planet. ]
BZZT WRONG, the gravity depends on the density of the planet and mass and distance from the center of the planet. The Planet would have higher gravity than the earth, but it would be a less than 4.5G. Probably between 1.6 - 2.8 Gs
BZZT WRONG, the gravity depends on the density of the planet and mass and distance from the center of the planet. The Planet would have higher gravity than the earth, but it would be a less than 4.5G. Probably between 1.6 - 2.8 Gs
You are correct.
And I think the exact answer for the ratio of Earth Weight to Planet X weight is, given equal densities of Planet X and Planet Earth, the cube root of 4.5. That turns out to be very close to 1.65.
So you would weigh 65% more on Planet X than you do here on earth. Those aliens who now watching our late 80's TV will be shorter and fatter than we are. Well at least shorter assuming they haven't discovered fast food yet.