# Circular orbit

1. Feb 15, 2007

### Weave

1. The problem statement, all variables and given/known data
What is the acceleration due to gravity of the sun at the distance of the earth's orbit?

2. Relevant equations
Confused on which one to use

3. The attempt at a solution

2. Feb 15, 2007

### andrevdh

The sun attract a body according to Newton's universal gravitational law (falling apple), $$F_G$$. The acceleration of a body due to this force will then be

$$a = \frac{F_G}{m}$$

where m is the mass of the body. Will this acceleration be the same for all bodies at the same position w.r.t. the sun? Why?

3. Feb 15, 2007

### tony873004

You can also use a=GM/r^2 where G is the Gravitational constant, M is the mass of the Sun (in kg if you use 6.67e-11 for G) and r is the Earth Sun distance in meters (again, if you use 6.67e-11 for G).

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