In the vast universe, galaxies rotate in ways that don’t make sense if only visible matter is considered. For almost a ...

k{g^{- 2}}\). Overall this equation is simpler than it looks as long as you ensure that: distance is given between centres units are all in metres and kilograms The force of gravity exists between ...

What is gravity without mass ... solving a simplified version of the Einstein field equations that allows for a finite gravitation force in the absence of any detectable mass.

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.