# Finding the mass of the Earth.

My class was given an assignment to design an experiment where we could determine the mass of the Earth, using the equipment found in our lab. (basic highschool stuff) I know we use gravitation pull in some way, towards the sun (?) but all the research i've done and explanations i've found, i'm having a hard time understanding. Any help would be great, thanks.

are you allowed to use the gravitational constant G?

dextercioby
Homework Helper
Not only G,he should use the mean Earth radius as well...I think this is more a theoretical problem.After all,in the lab u could come up only with "g"...Maybe a Foucault pendulum would be useful as well...

Daniel.

He can find earth's radius using the ancient greek method... measuring the shadow of two sticks far away.... cell phone and auto mobile make this experiment doable.... but i don't think it is possible to find G in a highschool lab...

i think we are allowed to use the constant, at least i am, and could someone please explain how a pendelum would help?

futb0l
A pendulum's oscillation depends on the gravitational acceleration.