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 Form 4 Physics: Floating and sinking online lessons

Relative density of a floating body; experiment to determine the relative density of a cork

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Answer Text:
Relative density of a floating body:
Experiment: To determine the relative density of a cork
Procedure:
1. Select a sinker which is heavy enough to make the cork to sink.
2. Attach the cork and the sinker as follows
figsinking24720201213.JPG
3. Record the results obtained as follows
Weight of the sinker in water= W1
Weight of the sinker in water and cork in air = W2
Weight of the sinker and cork in water = W3
Weight of the cork in air = W2 – W1
Upthrust on the cork = W2 –W3
The relative density of the cork in air is determined as
follows;
d = weight of the cork in air /upthrust on the cork.


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