The earth has a radius of 6400 km and it rotates itself once
every 24 hours.
(a) What is the angular velocity, ω, of an object sitting
still at the equator of the earth. (Note that direction
is at an angular velocity due to the rotation of the earth around
itself.)
(b) How many radians does the object rotate per hour?
(c) What is the central acceleration of the object?