Many nobles have tried but I'm not so sure exactly!!:-):)
Theseus
arthur
Unable is a synonym for can't or can not. Example: "I am unable to lift the stone." is the same as "I can't lift the stone."
It is easier to lift a heavy stone under water because the water provides buoyant force that counters the weight of the stone. This buoyant force reduces the effective weight of the stone when submerged in water, making it easier to lift. In air, there is no buoyant force to counteract the weight of the stone, so it feels heavier to lift.
Hazrat ALI Murtaza 's sword was so heavy that any ordinary man could not lift it.
It is easier to lift a small stone than a big stone because small stones typically weigh less and require less force to lift. Additionally, smaller stones are easier to grip and handle compared to larger stones, allowing for better leverage during lifting.
Large stone has more mass compare to a small one. And mass is directly proportional to weight where 'g' is constant for every object on earth. As a result larger stone has more weight than that of smaller. That's why it is difficult to lift larger stone on the surface of the earth but easier to lift a smaller one.
Two words, mechanical advantage.
If the question is asking "for what reason would a person lift a heavy stone immersed in water as opposed to air?" then the answer is buoyancy. When immersed in water there will be an upward force on the bottom of the stone due to the volume of water it has displaced. This upward force will make the stone seem lighter to the person lifting it by decreasing the amount of force they need to exert to lift it.
Theseus had to lift a boulder and beneath it were sandals and a sword when Theseus finally was strong enough to lift it he journied to Athens where he met his father the king
Though I doubt your ability to make stone, I do believe that you could mine and or cut an existing one and there are many such stones that I could not lift.
A big rock is heavier to lift than a small stone because it has more mass and thus more gravitational force acting on it. This makes it more difficult to overcome gravity when lifting the big rock compared to the smaller stone.