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Rotation Slows, This Is What Happens If The Earth Stops Rotating

Jakarta, CNBC Indonesia – Earth’s rotation is reportedly slowing down. This makes the length of the day increase by an average of about 1.8 milliseconds per century, which means 600 million years ago one day was only 21 hours.

Unfortunately, scientists don’t yet know what causes Earth’s rotation to slow down. According to them, this incident will continue, quoted from Science Times, Wednesday (12/8/2021).

But what happens if the Earth stops rotating?

quote Live ScienceIf this were to happen then the angular momentum of every object on Earth would tear the surface and the results would be dire, but “just a thought experiment,” said James Zimbelman, Senior Geologist Emeritus at the Smithsonian’s National Air and Space Museum.

“There is no force of nature that will stop the Earth from turning, because it has been spinning since it was formed and is quite impressive.”

For information, the Earth rotates every 23 hours 56 minutes and 4.09053 seconds. This means that the movement has a speed of 1,770 km / h with the rotational speed decreasing to zero at the poles.

If the rotation stops, then the angular momentum exerted on the air, water and even rocks will continue to move at a speed of 1,100 mph. The motion would scour the surface and tear apart, sending shards up into the upper atmosphere and into outer space.

Angular momentum itself is analogous to rotation with linear momentum. It is the product of the moment of inertia, or rotational force required to rotate the mass, as well as the angular velocity.

“One of the fundamentals of physics is the conservation of angular momentum. Once something spins, you have to exert an equal force (in the opposite direction) to stop it from spinning,” he explained.

The pieces that break off from the surface can rotate around the Earth and the rest around the Sun, Zimbelman said. In the end, the planet’s gravitational pull tugs at the halos with unexpected effects.

According to him, this finding was helped by the findings of physicist Isaac Newton several centuries ago. “What (Isaac) Newton found helping us with classical mechanics is that pieces that accumulate and move closer will release some of their own energy, heating everything up,” Zimbelman said.

This is likened to a meteorite traveling through the sky. The remains of the object will be at the end of the atmosphere and space, and are pulled to the surface due to the planet’s gravity and will release energy when they collide.

The bombardment of the chunks makes the crust melt into melted oceans. And in the end the colliding fragments will be absorbed into the liquid ocean through a process called accretion.

[Gambas:Video CNBC]

(npb/roy)



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