Posted by **john** on Friday, November 19, 2010 at 3:59pm.

The earth orbits the sun once a year (3.16 10^7 s) in a nearly circular orbit radius 1.50 10^11 m. With respect to the sun, determine the following.

(a) the angular speed of the earth

1 rad/s

(b) the tangential speed of the earth

2 m/s

(c) the magnitude and direction of the earth's centripetal acceleration

i got a and b but not c please help

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