Mass of a planet/sun

  • Thread starter lemon
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  • #1
lemon
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1. The distance between the Sun and Earth is 1.5x10^11m and the Earth's orbital speed is 30km/s. Use this information and the value of G to estimate the mass of the Sun

could somebody check this for me please. thank you

2. G=6.67x10^-11Nm^2kg^-2

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Answers and Replies

  • #2
rock.freak667
Homework Helper
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Your working is correct, you numerical result is wrong. Your final answer should be in the order of 1030
 
  • #3
lemon
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it is too.
It should be 2.0x10^30(1s.f.)?
 
  • #4
D H
Staff Emeritus
Science Advisor
Insights Author
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That is the answer you should get. Now look at your expression, and see if you really did calculate what you wrote down. (Hint: you didn't.)
 
  • #5
lemon
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I blame the calculator. Who's with me?

thanks everyone for this.:smile:
 

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