# How does centrifugal force affect Earth?

## How does centrifugal force affect Earth?

Earth’s gravity is a bit stronger at the poles than at the equator, because the Earth is not a perfect sphere, so an object at the poles is slightly closer to the center of the Earth than one at the equator; this effect combines with the centrifugal force to produce the observed weight difference.

## How many extra miles does the earth bulge out due to centrifugal force?

The Earth has an equatorial bulge of 42.72 km (26.5 miles) due to its rotation. That is, its diameter measured across the equatorial plane (12756.28 km, 7,927 miles) is 42.72 km more than that measured between the poles (12713.56 km, 7,900 miles).

Why we are not thrown off the surface of Earth by centrifugal force?

Normally, humans aren’t thrown off the moving Earth because gravity is holding us down. However, because we are rotating with the Earth, a ‘centrifugal force’ pushes us outwards from the centre of the planet. If this centrifugal force were bigger than the force of gravity, then we would be thrown into space.

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Which bulge causes a centrifugal force?

An equatorial bulge is a difference between the equatorial and polar diameters of a planet, due to the centrifugal force exerted by the rotation about the body’s axis.

### How is the centrifugal force at the equator?

The centrifugal force on your body at the equator is 0.034 m/s2 times the mass of your body. The centrifugal force at the poles is zero.

### Does Earth bulge at equator?

Earth bulges slightly at the Equator. As indicated in Figure 25, the effect of the Sun’s gravity on the near bulge (larger than it is on the far bulge) results in a net torque about the centre of Earth.

Why is the Earth bulging at the equator and flattening at the pole?

The bulging of the equator and flattening at the poles is due to the rotation of the Earth. The Earth rotation creates the centrifugal force which is the pseudo effect counter. The pseudo effect pushes the earth outwards, bulging form the Earth and flattening at the poles.

What does it mean when the Earth is thrown off its axis?

According to Business Insider, Earth spins at an angle of around 23.5 degrees; if that axial tilt were to change enough to spin sideways on its axis, whole portions of the planet could be plunged into darkness or thrown into direct sunlight for months at a time. …

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## What would happen if the Earth spun the other way?

Answer 2: If the earth abruptly changed its rotational direction, probably many things we see every day would be destroyed. Skipping over the transition, however, an earth rotating in the opposite direction would, among other things, cause the sun, moon and stars to appear to rise in the west and set in the east.

## Why is the Earth bulging at the equator?

The Earth is wider at the equator than from pole to pole, mainly because the centrifugal forces of its rotation make it bulge outwards. Satellites can measure its average shape using gravity and altitude data. Over most of the past 20 years, these observations showed that overall the Earth is becoming more round.

What causes the bulging of the Earth at the equator and flattening at the poles?

The bulging of the equator and flattening at the poles is due to the rotation of the Earth. The Earth rotation creates the centrifugal force which is the pseudo effect counter. It balances the centripetal force that acted in inward direction.

Why is there an equatorial bulge in the Earth?

Therefore for the pressure in the two tunnels to balance, the column of water in the equatorial tunnel must be longer by 1/578 of the earth’s radius. This gives us an equatorial bulge, due to centrifugal forces of about 11.035 km.

### How do you calculate the size of the earth’s bulge?

A simple way to calculate the size of the bulge, is to use the equation v² /r to work out the effective reduction in the mass of the water in the equatorial tunnel, resulting from the centrifugal force. The speed of a particle on the equator is: 2p ´ 6,378 km (the earth’s radius) per day (actually 23hrs 56 minutes).

### Why does an object bulge in a circle?

The bulge is because objects want to continue in a straight line tangent to the circle they are on. But you might as well give it a name and introduce centrifugal force. Almost, but not quite.

Why is the Earth’s rotation called a nudge?

That rotation changes the Earth from a perfect sphere to a slightly flattened one, thicker across the equator. The attraction of the Moon and Sun on the bulge is then the “nudge” which makes the Earth precess.