Pressure acts in a fluid in all directions. It increases with depth due to the increased weight of fluid, and results in an upthrust. Objects sink or float depending on whether the weight of the object is bigger or smaller than the upthrust. Different stresses on a solid object can be used to explain observations where objects scratch, sink into or break surfaces.

The Essentials

100% Sheet Pressure

Deeper Understanding

You can use the pressure equation to make predictions about pressure and also rearrange it to find force or area if you are given the other 2 variables

Pressure = Force / Area

Force = Pressure X Area

Area = Force / Pressure

Other Links

BBC Bitesize – Pressure

Review your Understanding

Have you learnt all the facts on the 100% sheet?

Have you completed the BBC Bitesize tutorial?

Have you been able to complete all the questions on the 100% sheet?

Let us know how you feel about this topic in the comments section below. Any questions you have, just ask.

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