I took a couple of pieces of chalk from the Marbles sample, added Physics with Rigged Body Preset, lift up two pieces of chalk, and let them go.
They fall back into exactly the spot I lifted them up from. I even tried rotating the chalk 45 degrees so it would land on it sides and then bounce a little or a least roll over. Instead the pieces are like a cat that lands on its feet every time.
Is there something else I have to do to make the object fall and not land like it was perfectly placed?