Calculating Tangential Speed and Centripetal Acceleration on Earth's Equator

[rainy365days]

1. ______ stands on the Earth's equator. Calculate his tangential speed. The Earth has a radius of 6.38 x 10^6 m. What is ______ centripetal acceleration?



2. 2∏r/T (Circumference/Time) and V2(squared)/r. (Velocity Squared/Radius)

I don't even know how to start this problem.

 

[LawrenceC]

How fast does the Earth rotate on its axis? That defines the speed which must be expressed in radians per unit time. Do you know what a radian is?