A large block of ice 5m thick has a vertical hole drilled through it and is floating in the middle of the lake. What is the minimum length of the rope required to scoop up a bucket full of water through the hole? (relative density of the ice=0.9 )
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Let the ice is x m above the water level.
Let atas of the ice block is A.
Then weight of ice block= A×5×0.9
Weight of water displaced=A×(5-x)×1
As ice is floating, therefore
A×5×0.9=A×(5-x)×1
And by solving this we get x=0.5 m
So the minimum length of the rope is 0.5 m