# What is the Iinear speed of a point on Earth's equator? What if the point was at latitude -15.0° ?

##### 1 Answer

#### Answer:

At the equator, linear speed with respect to the polar (day/night spin ) axis is 463.82 meter/s = 1521.8 feet/s, At latitude

#### Explanation:

In the day-night spin, any point on the Earth moves around Earth's

axis in its latitude circle.

Speed = (distance traveled in a second)/second..

The circumference of the equator =

The number of seconds in a day = 24 X 3600

So, at the equator, speed =

0.46382 km/s = 463.82 meter/s = 1521.8 feet/s.

At

radius is

6374.5 km, nearly.

The latitude-circle circumference

=

So, the speed is (

0.44777 km/s = 447.77 meter/s = 1469.1 feet/s

.

Thanks to Johannes C for pointing to the error in the unit km,

used for meter, in my earlier edition...