The radius of the earth's orbit around the sun (as...

The radius of the earth's orbit around the sun (assumed to becircular) is , and the earth travels around this orbit in 365days.
a) What is the magnitude of the orbital velocity of the earthin m/s?
b) What is the radial acceleration of the earth toward thesun?
c) What is the magnitude of the orbital velocity of the planetMercury (orbit radius , orbital period = 88.0 days)?
d) What is the radial acceleration of the Mercury?
thanks in advance..
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    1. jacob chen
      jacob chen

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