Upthrust is the upwards force felt by a submerged object caused by fluid pressure.
The upthrust is equal to the weight of fluid displaced.This is known as the Archimedes' principle.Given density = mass per unit volume:m = V ρand weight of fluid displaced is the mass × gravitational field strength:W = mgtherefore the weight of fluid displaced is given by:W = V ρ g
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Specification: Edexcel Physics (8PH0), AS-level, Topic 4: Materials, statement 50. Topic: Fluids.
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