Question

what is gravity ?????​

Answer 1

Answer:

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.

Answer 2

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Gravity, as Newton posited, is the force that keeps the Earth in orbit around the Sun. As you may remember from your days in school, gravity tends to be defined as: "The force by which a planet or other body draws objects toward its center.

Artificial gravity can be created using a centripetal force. A centripetal force directed towards the center of the turn is required for any object to move in a circular path. In the context of a rotating space station it is the normal force provided by the spacecraft's hull that acts as centripetal force.

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The mathematical formula for gravitational force is F=GMmr2 F = G Mm r 2 where G is the gravitational constant.

For example, if you had an object of 10 kg and 100 kg falling in free fall at the same time, the Fg (gravitation force) exerted on the 10 kg object is 10*9.8=98 N, and for the 100 kg object it is 100*9.8=980 N, so the force of gravity is proportional to the mass of the object as acceleration stays the same (9.8 m/s)