Earth rotation speed calculator
Find the speed of a point carried around Earth’s axis at your latitude, then compare it with the equator. A latitude circle becomes smaller toward either pole.
At 51.5° latitude, a point travels at 1,041.15 km/h around the axis. Its latitude-circle radius is 3,966.041 km; neither speed nor the listed inward acceleration is the local gravitational acceleration.
Read this calculation
v = 2π R cos φ / 86,164.0905 s
A point at latitude φ travels around a circle of radius R cos φ once per sidereal day. Its speed falls to zero at the poles and to half the equatorial value at 60° latitude.
Constant speed alone does not produce a sensation of motion. Circular motion still has inward acceleration; the result lists that acceleration separately from the speed and from gravity.