Hi fellas.. I am not so good with physics .. Clearly defined because I am a programmer... I came across this question during one of my simulation experiments . I was using RK4 integrator to solve equations . Which means i feed in momentum to calculate the velocity. Momentum = mass x velocity I hope i did get that equation correctly. This meant that to find the velocity i multiple momentum with inverse mass. . So for increasing the velocity of the particle u decrease the mass .. but is nt it a practical observation that a heavier object falls down faster...???? Am i wrong in saying this??? can someone tell me the physics behind it?