the question: What is the acceleration due to gravity of the sun at the distance of earth's orbit? before i attempt this problem, can someone help me identify the given information that i may need that is not given in the question, maybe gravity (9.8) or where to use it. i believe i may need this formula (2pie*r)/T also may need to find rpm's and convert to rev's, in order to get velocity, and then use the velocity in a formula to get the acceleration. I think thats the approach i may need, its just the information isn't available in the question. this was from memory. maybe some typos. thankyou for any help.