Original post by Amamiya
Anyone know how to do this q?
I’m pretty sure you want to start from the equation g = (-)GM/r^2, as opposed to the force equation.
I’d start by working out an expression for g on earth by using r = D/2 and a mass of M. You then set this expression equal to 9.81, which is the accepted value of g on earth.
Now use the same equation again, but this time, for the planet with a mass of M/9 and a diameter of D/2 (remember to work out the planet’s radius from this). You now want to take out a factor of the expression for g on earth and substitute it for 9.81.
Quick Reply
Related discussions
- Issac Physics Problem that I am stuck with
- Physics
- Gravitational potential is independent of mass
- PAT space question
- physics
- GCSE Physics - Resultant Forces
- OCR A Gravitational fields help
- Electric Fields Help
- physics question
- SOAS vs USA Uni
- Physics A Level unit 4 questions
- Why I Chose To Study Fine Art AND Art History
- Career opportunities in psychology after masters
- A level physics question on gravitational fields
- How far from the Earth do you have to be to be at true 0 gravity?
- AQA A Level Physics Paper 2 7408/2 - 10 Jun 2022 [Exam Chat]
- Switching from Biochemistry to Chemistry at Imperial College
- Help with dimensional analysis....
- ¬ lily's bizarre y13 adventure / y13 study journal ゴゴゴ (2023/2024)
- Dr Kathy Romer answers your questions about Physics!
