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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?