Why does the world pivot on its axis?

Answer 1

The world spins around because of the way the solar system was formed as a spinning cloud of matter. This then it began to collapse in on itself as it did this the heat at the centre became so great that the sun ignited and pushed out all the matter which then formed the planets, still spinning because of the energy from the explosion as the sun ignited.

Supplement 2 As far as the planets are concerned, they would have had some net rotational momentum, the residual of all the components that made the planet.

This rotational energy cannot be destroyed - it however might be cancelled out by opposite-spin material.

BUT back to the question. The Earth carries the residual net spin from its assembly from space debris.

Answer:

The rotation comes about from the conservation of angular momentum. The formula for angular momentum is:

L=mwr2

• m is the mass,
• w is the angular velocity in radians per second, and
• r is the radius of the circular motion.

Due to conservation of angular momentum, as the radius of the orbit decreases, then its angular velocity must increase (as the mass is constant). As a consequence the parts of the planet closer to the primary (the Sun) must rotate faster than the parts furthest from the Sun. This causes the spin.

This all relates to the fact that planetary and stellar systems are born from the collapse of dense interstellar clouds. As the clouds collapse even a small rotation is magnified by the contraction. If the clouds were not rotating (matter fell straight to the center of the system) there would be no planets.

Answer 2

Conservation of angular momentum.

The matter that formed Earth and the other members of the solar system was in a swirling disk of dust. The angular momentum of that mass has been conserved according to the laws of motion and so the planets rotate around their axes as well as are in orbit around the Sun.

Answer 3

This simply means that the Earth rotates. The axis is the center of the rotation.

This simply means that the Earth rotates. The axis is the center of the rotation.

This simply means that the Earth rotates. The axis is the center of the rotation.

This simply means that the Earth rotates. The axis is the center of the rotation.

Answer 4

Just a couple reasons:

1) "Left over" rotational energy from formation.

2) Impact. Earth, Venus and Uranus are all thought to have suffered large impacts which affect the rotation direction and speed.

Answer 5

Basically, the Law of Conservation of Angular Momentum. Any spinning object has a tendency to continue spinning. To slow down Earth, a force would be required to slow it down - and the angular momentum would have to be transferred somewhere else.

Answer 6

The world pivots on its axis because of the angle it lays at naturally. As the world turns this is what causes the change between day and night.

Answer 7

the earth actually rotates around its own axis & revolves around the sun.rotation of the

earth is due gravitational/centrifugal force due to other planets

Answer 8

This simply means that the Earth rotates. The axis is the center of the rotation.

Answer 9

Conservation of angular momentum.