Question

At the poles, how fast does the earth spin?

Answer 1

Hint: Since gravity pulls inward equally from all directions , the shapeless lump, if adequately enormous, will ultimately become a round planet. Inertia keeps that planet spinning on its axis unless anything takes place in order to disturb it.

Complete answer: When our solar system was formed from nebula, a gas cloud, there was lots of dust and gas appearing altogether due to the force of gravity. The dust and gas which was already moving in a circle clumped together to form the Sun and planets. These new objects began to spin and eventually spin faster.

The Earth spins at the rate of 1,000 miles per hour and spins once in every 24 hours. It rotates eastward, in prograde motion. The Earth rotates counterclockwise when viewed from the north pole star Polaris. The North Pole is the point in the Northern Hemisphere where Earth's axis of rotation meets its surface.
Let's assume the equatorial radius of the Earth to be,
 6378 km = 3963 miles. The spinning speed of the Earth is approximately 1669.7 km/h near the equator.
Explanation:
At latitude θ° N or S spin = speed is cos θ × spinning speed of the equator.
For example, the speed is halved at 60° N.
Thus at the poles (lat = 90° and cos 90 = 0) are not rotating. Hence, the angular speed 15 degree per hour remains the same.

The Equator is at an equal distance from both the North pole and the south pole. The angular velocity at the poles is low due to less distance between the axis of rotation. This is the reason why the speed of rotation decreases near the poles.

Note: -The spinning of the Earth is constant but the speed depends on the latitude. The rotation of the Earth is accountable for the rising and setting of the sun, in the east and in the west respectively.
-The rotational speed of the earth is calculated by angular speed.
-The speed of the Earth’s rotation is slower at the North pole and fastest at the equator.