radial acceleration

[UrbanXrisis]

I need to calculate the radial acceleration of earth @ the equator

a=v^2/r
a= [1041m/s)^2]/6378m
a= 169.9 m/s^2

is this correct?

[Galileo]

I think the radius of the Earth is a tad larger than 6.4 km.
How did you get the v? The distance traveled in a day is the circumference of the equator.