Calculate the mass of Jupiter knowing that a person who weighs 490 N on the earth's surface would weight 1293 N on the surface of that planet. Jupiter has a radius of 7.15 × 10^7 m.

Answer 1

force gravity proportional to Mass/r^2

forceJupiter/ForceEarth=Mj/Me * (re/rj)^2
1293/490= Mj/Me * (re/rj)^2

solve for Mj. You can look up radius Earth, Mass EArth.