There are various methods to measure acceleration due to gravity. At Higher level all rely on one of the equations of motion. The measurements required will depend on the equation used.

The cause of this acceleration is a mystery and has ... This "other theory of gravity" uses a different recipe of equations to explain gravity without the curvature of spacetime, and also seeks ...

you can try calculating what the acceleration of the supertankers would be and how long it would take mutual gravity to move them closer by even a metre assuming no friction due to water resistance.

Although we take a lot of scientific knowledge for granted today, each of the basics – whether it be about light, gravity ... he focused specifically on the acceleration of the falling objects ...