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Archimede's Principle
# 2B40.20


Description: A bucket and a close fitting cylinder are used to show Archimede's principle. Suspend the cylinder from a Newton meter below the bucket and lower the cylinder into an overflow can full of water. Show the bouyant force as the difference in the scale reading before and after lowering the bucket cylinder into the water. Take the water that overflowed into the catch bucket and pour into the bucket (above the cylinder). The weight of this water will equal the buoyant force and return the scale reading to its value before the cylinder was lowered into the water.

Volume of Plummet: 100 cm3
Mass of Plummet: >= 120g
Volume of Cavity in Bucket: 100ml
Dimensions: 5.5cm X 5.5cm X 5.5cm
Weight of Bucket and Plummet: 1.5 Newtons

Purchased/Built: purchased

Setup Time: 1 hour

Quant. in Demo Room: 1

Source: Central Scientific

Demo References
The Video Encyclopedia of Physics Demonstrations Disc 12-12 Suspend a pail and weight from a spring scale, lower the weight into water, collect the overflow, pour it into the pail.
Hilton M-20c The four step Archimedes' principle with a close fitting cylinder and bucket.
Sutton M-283 Hang a cylinder turned to fit closely inside a bucket from the bottom of the bucket while suspended from the bottom of a balance. Immerse the cylinder in water and then pour water into the bucket.
Freier and Anderson Fg-1 A cylinder and bucket of the same volume hang from a scale. Immerse the cylinder in water, catch the runoff, pour it back into the bucket.

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