OCR GCSE Physics A · J249
Specification P1.3i · Paper 1 (Foundation), Paper 3 (Higher)
Revise: Pressure in liquidsThe liquid’s pressure forces therefore have an upward resultant called upthrust, or the buoyant force.
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GCSE Physics · key term
The overall upward force exerted by a fluid on an object because pressure is greater on its lower surfaces than on its upper surfaces.
Used by OCR
Specification P1.3i · Paper 1 (Foundation), Paper 3 (Higher)
Revise: Pressure in liquidsThe liquid’s pressure forces therefore have an upward resultant called upthrust, or the buoyant force.
Do not argue that an object floats simply because it is small or light. Floating depends on the balance between upthrust and weight.
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