Newton's Law of Universal Gravitation is written as: \(F=G\frac{m_1m_2}{r^2}\) The constant of proportionality is the universal gravitational constant ("big G") which equals \(6.674\times{10^{- 11}} ...

{2} a t^{2}\). No, the acceleration due to gravity is constant. Providing the object does not build up too much speed and air resistance is not a factor the acceleration measured should be the same.