Upthrust (OCR GCSE Physics A (Gateway Science Suite)): Flashcards
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11 cards from this deck
What force do submerged objects experience?
What force do submerged objects experience?
Pressure
How does pressure change with depth?
How does pressure change with depth?
Pressure increases with depth
Which surface has more pressure?
Which surface has more pressure?
Bottom surface
Direction of upthrust
Direction of upthrust
Upwards
What is upthrust?
What is upthrust?
Resultant upward force on a submerged object
Upthrust equals
Upthrust equals
Weight of water displaced by object
When does an object float?
When does an object float?
When upthrust equals or exceeds object's weight
When does an object sink?
When does an object sink?
When upthrust is less than object's weight
What determines floating/sinking?
What determines floating/sinking?
Density of object
What is the volume of displaced water?
What is the volume of displaced water?
Same volume as the object
Why does upthrust exist?
Why does upthrust exist?
Bottom pressure greater than top pressure