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simple PHYSICS!!!

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The sun goes around the center of our galaxy once every 250 million years. The sun is also 2.55×10^20 m from the center of our galaxy. What is the acceleration of our sun towards the center of the galaxy in m/s^2?

  • simple PHYSICS!!! - ,

    v^2/r

    to get v
    first the period T
    250*10^6 yr (365 d/yr)(24 hr/d)(3600s/hr)
    = 7.88*10^15 seconds period
    speed = 2 pi r/T
    = 2 pi (2.55*10^20)/7.88*10^15
    = 2.03 * 10^5 m/s

    Ac = v^2/r = (2.03*10^5)^2 /2.55*10^20
    = 1.62 * 10-10 m/s^2

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