Here's what would happen if Earth was the size of
Jupiter.
On an Earth the size of Jupiter, your body would
be 11 times heavier due to the higher surface gravity.
You wouldn't have the muscle strength to get up from
the couch, and even breathing would be nearly impossible.
Our new planet would be 1300 times bigger than Earth
today.
This giant earth would pack an environmental punch.
Boiling and freezing points would change significantly and large chunks
of ice like icebergs could melt away.
Also dropping a huge planet in the middle of our
solar system who would have major consequences.
This gravity could be strong enough to pull the moon
apart into teeny tiny pieces.
This new Earth could potentially even push the asteroids out
of the asteroid belt and send them to collide with
you.
And you couldn't even move to get away so.