Proof of earth's shape is that earth casts a curved shadow on the moon during a lunar eclipse. Something flat like a book casts a straight shadow whereas objects with curved surfaces casts curved shadows.
The center of gravity for a spherical object is located at the exact center of the sphere. This point is equidistant from all points on the surface of the sphere, making it the point where the force of gravity can be considered to act on the object.
At the earth's center, the acceleration/force of gravity is theoretically zero.(At least the force of gravity between the earth and an object at its center. There's still the gravitational forcesbetween the object and everything else ... the sun, moon, stars, etc.)
Residual gravity is the effective gravity that exists between the earth-moon or the earth-sun combination. When two heavenly bodies interact such as the earth and the sun there is a difference in mass which causes a residual gravity to exist in the space between them. This residual gravity is responsible for the earth's orbit.
Earth is slowly flattening out. Our planet used to be almost exactly spherical when it just formed, but over time it squashed out. You can test this by taking a piece of salt dough and rolling it into a ball. Then, put it inside a pail with a long string handle. Whirl the pail around your head for a while, then examine the salt dough. It will be flattened. To make salt dough: Mix salt, flour, and water.
The moon's gravity is about 1/6th of Earth's gravity.
Gravity
Gravity.
The Earth is almost spherical. It's slightly squashed, or oblate.
In space, flames become spherical due to a lack of gravity to pull the flames upwards. The absence of gravity causes the flame to burn in all directions uniformly, creating a spherical shape. This phenomenon is known as a "cool flame" and is different from flames on Earth, which are affected by gravity.
The earth is spherical because the gravity pulls all the sides towards the core and its equal gravitational pull all round so this ceates a speherical like shape.
earth
That is due to gravity. Any large deviation from a spherical shape - such as a mountain that is more than a few kilometers high - would be squashed down by gravity.
almost the same to earth
It does. Earth is moved by the gravity of the sun and, to a lesser degree the moon. We are move by almost the same amount and so we move with Earth. Since Earth's surface is our point of reference and we are moving with it, we don't notice it. We observe the effects of the gravity of the sun and moon in the tides.
Because the earth is held together by gravity and also because if they were not new plates would not form.
Yes. The effects of gravety on Mars are less than on Earth. Mars has 37.6% of Earth's gravity.
Jupiter's gravity It is not massive enough to pull itself into a spherical shape like something the size of the moon or Earth.