Difference between revisions of "Upthrust"

Revision as of 13:19, 15 October 2018

Upthrust is a force that acts upwards in a fluid due to the fluid being displaced.

The force of upthrust is equal to the weight of fluid that has been displaced.

An object in the water experiences as lot of upthrust because water is dense.

Upthrust is weak in the air because the air is not very dense. For most objects in air upthrust can be ignored because it is so small.

Upthrust is caused by the pressure in a fluid. Pressure increases with depth so the bottom of an object will experience more pressure than the top. This difference in pressure results in a difference between the force on the bottom and the top, known as upthrust.


A boat floats on the water because the weight is balanced by the upthrust.	A submarine can change the amount of upthrust in order to rise or sink in the water.

@@ Line 8: / Line 8: @@
 : An [[object]] in the [[water]] experiences as lot of [[upthrust]] because [[water]] is [[Density|dense]].
 : [[Upthrust]] is weak in the [[air]] because the [[air]] is not very [[Density|dense]]. For most [[object]]s in [[air]] [[upthrust]] can be ignored because it is so small.
-: [[Upthrust]] is caused by the [[pressure]] in a [[fluid]]. [[Pressure]] increases with [[depth]] so the bottom of an [[object]] will experience more [[pressure]] than the top. This difference in [[pressure]] results in more [[force]] on the bottom than the top, known as [[upthrust]].
+: [[Upthrust]] is caused by the [[pressure]] in a [[fluid]]. [[Pressure]] increases with [[depth]] so the bottom of an [[object]] will experience more [[pressure]] than the top. This difference in [[pressure]] results in a difference between the [[force]] on the bottom and the top, known as [[upthrust]].
 ===Examples===
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