Solutions

Through experimentation Roy finds out everything is same except gravity varies as given above and G has different units to keep unit of force still same. Roy immediately notices that the ALIENS start attacking his spacecraft, with what velocity should the his spacecraft be launched in order to escape from that planet's gravity (R is the radius of the planet)?

Answer: Roy needs infinite velocity to escape from the gravity of the planet, which is impossible!! So Roy is being captured by ALIENS now :-(