Saturday 2 April 2016
5.5 understand that the pressure at a point in a gas or liquid which is at rest acts equally in all directions
Pressure is a measure of the force being applied to the surface of something. In gases and liquids (at rest) the pressure at any point acts equally in all directions. for example, if you fill a bag with water, then poke a hole at the bottom of the bag, water will 'squirt' out of the bag (obviously). However, if you put a hole near the top of the bag, the water will 'squirt' out with the same force. This is because the pressure of the water is the same at the top of the bag as it is in the bottom of the bag.
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i thought pressure increases with depth
ReplyDeleteI think this is a bit inaccurate considering that if water were to be squirting out on the top, it would I’d so slowly compared to it squirting from below where it would squirt out the water faster as there is a higher pressure down than up due to the mass of the water.
ReplyDeleteday before the exam gang
ReplyDeletePlease correct this post since it is not correct. Water will not squirt at the same rate since, at the bottom of the bag water from above will be applying pressure. This question is not meant for this answer, it is meant to talk about newtons third law and how an object will excert an equal and opposite force.
ReplyDeletethe correct example to use is a watering can, where water will squirt out from all directions with the same force - of course considering that the area of the holes on the watering can are the same size
ReplyDelete