Finding the mass of the planet
Hi,
I'm doing an independent course, so whenever I need help with a question it is very difficult to find it. The lesson I am on now has given me a question that I have no clue how to begin working on.
Basically, a team of space explorers lands on a planet with a radius of 7.5*10^6 m. A 1kg mass on a spring scale measures 8.5N.
I have to find the mass of the planet, and if an astronaut weighs more or less on that planet than Earth.
I've gone back and forth through the lesson and I can't figure out my first step. There were no questions involving finding the mass of a planet so it is very confusing.
I imagine we already know that a person weighs less on that planet than Earth because 1kg = 9.8N on Earth.
Any help is much appreciated,
Thanks
