(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

It can be assumed that the Earth, to a good approximation, moves in a circular orbit about the sun. Determine the speed of the Earth.

2. Relevant equations

v^{2}= GM_{earth}/r

3. The attempt at a solution

m_{earth}= 5.98x10^{24}

R of earths orbit= 1.49x10^{11}

G= 6.67x10^{-11}

v^{2}= (6.67x10^{-11})(5.98x10^{24})/ (1.49x10^{11})

v^{2}= (3.98x10^{14}) / (1.49x10^{11})

v= [itex]\sqrt{}2676.9[/itex]

v= 51.7m/s

Now here's the problem. My teacher said that the answer to this question is 2.97x10^{4}m/s

What is it that I am doing wrong? D:

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Gravitational fields

**Physics Forums | Science Articles, Homework Help, Discussion**