- #36
Ravi Singh choudhary
- 125
- 7
Now what I understood reading the complete thread. Boat is assumed weightless and stone is of finite density & some finite volume. Now only weight of stone will contribute in displacing certain volume of water. The proportion of density between water and pebble will decide how much volume (multiple of stone's volume) water will be displaced. As the weight of stone will be equal to the weight of displaced water I.e. Archimedes principle. Let's say the density of stone is 1000 times that of water. So when pebble is in the boat it will displace 1000 times more volume compared to the pebble sinking to the bottom of the pool. Because when pebble is sinking it is only displacing its own volume. So level of swimming pool will fall after throwing the pebble.