Question

State the changes of 'g' with the height about the earths surface.

Answer 1

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Gravity changes with altitude. The gravitational force is proportional to 1/R2, where R is your distance from the center of the Earth. Here is an example: The radius of the Earth at the equator is 6400 kilometers. Let's say you were in a jet at the equator that was 40 kilometers high above the earth's surface.


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Answer 2

the value of g =9.8 but when body freely falling then position sign means +9.8 and when body goes to height then g is negative sign means-9.8