Diagram 1 Diagram 2
Diagram 1 and Diagram 2 shows an object being weighed in air and in water respectively.
Rajah 1 dan rajah 2 masing-masing menunjukkan satu objek ditimbang di udara dan di dalam air.
What is the buoyant force on the object?
Berapakah daya tujah ke atas terhadap objek itu?
A 1.2 N
B 3.6 N
C 4.8 N
D 6.0 N
E 7.2 N
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Answer
A
F=mg
6.0N -4.8N=1.2 N
or
Weight of displaced water = 1.2 N
Archimedes' principle states that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces.
For a fully submerged object, Archimedes' principle can be reformulated as follows:
apparent immersed weight = weight of object - weight of displaced fluid