What is gravity?????
Answers
- Gravity, also called gravitation, in mechanics, the universal force of attraction acting between all matter. ... On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth's mass exerts on them. Gravity is measured by the acceleration that it gives to freely falling objects.
Gravity is what keeps the planets in orbit around the sun and the moon around the Earth. Hence, we can say that.
Gravity is a force that attracts a body towards the centre of the earth, or towards any other physical body having mass.
A few examples of gravity at work are:
The gases in the sun are held together by gravity.
Gravity is responsible for water to rest at the bottom of a glass instead of hovering over at the top of the glass.
The force of attraction between the earth and the moon causes tides in the ocean. This is the result of gravity.
Gravity causes the moon to revolve around the earth.
Gravity is the weakest of the four known fundamental forces of nature, yet it is the most dominant force. Even though it is the weakest force, Gravity holds together the entire solar systems and galaxies.
The speed of free fall is consistent over the surface of the earth. This means all objects fall at the same speed. This speed on earth is calculated to be 9.8 m/s.
The best current estimate of G is that it equals about 6.67259×10−11 newton-square meter per square kilogram.
The force of attraction between you and the Earth is your weight
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An object must travel 7 miles a second i.e. the earth’s escape velocity to leave Earth’s gravitational pull behind.