: Sinking Boat Problem

[somya]

Put a nut in a cup. Float the cup in a jar of water and mark the
water level in the jar.

Punch a hole in the bottom of the cup and again put it in water.
Water starts entering the cup and it gradually sinks. Observe water
level in the jar while the cup is sinking and after it has sunk.
Now Answer
1. When the cup is sinking, water level in jar
(a) Increases (b) Decreases (c) Remains same

2. When the cup has sunk, water level is
(a) Increasing (b) Decreasing (c) Remains same

3. Name the principle on which this activity is based?

[mibn2cweus]

The mass (weight) of the water displaced is equal to that of that which displaces it. The volume of water displaced is likewise of equal mass.

See 'buoyancy' and 'displacement' for further details.

notice: I haven't actually answered the questions. ;o)

[jomifl]

Archimedes didn't discover the principle named after him by asking other people what the thought would happen. He did the experiment.

[woofgang]

jomifli for best answer.

[jomifl]

That's a kind thought Woofgang, I sometimes find it is quicker to do an empirical experiment rather than try to get an answer from theoretical considerations.