Who Discovered Acelleration due to gravity?

Question

Who concluded that Acceleration due to gravity was 9.8m/s/s?

Pleasse help!

I thought it was galileo galilei

Answer 1

Galileo tested gravity with experiment and formulated the first rudimentary laws of motion including the principle of relativity of Relative motion before Einstein's time.
Newton took the formulations of Galileo and Keppler to develop a Universal gravity force equation
between large masses.Newton stated 3 laws of motion.
The first law was the law of inertia., the second was the law of force ,and the third law explained what happens when masses interact with space or other masses.
Classical physics later defined gravity as a field to be the ratio of a gravitational force to a gravitational mass.
Therefore the gravity field is the acceleration.Cavendish was the one who proved by experiment Newton's Universal Gravity constant to be the 9.81 meters/sec^2 that we measure today on the Earth surface.

Relativity theory did away with Newton concept of force as being fictious . He redefined gravity not as force but as a distortion of space time. And formulated the" Field equation "which related gravity fields to a curvature of space in a geometry of a manifold.

Answer 2

Sir Issac, of course.