Zusammenfassung der Ressource
Pressure
- Air Pressure
- If I blow up a balloon I am
pushing more air particles
into it meaning there are
more bouncing off the
sides of the balloon
creating high air pressure
- A balloon would burst easily if I pressed it against one nail
because a small surface area means high pressure, if I
pressed the same balloon against 20 nails it would take more
force to burst as they would have a higher combined surface
area meaning a lower pressure
- Calculating Pressure
- Pressure=force/area
- Water Prssure
- The deeper you go under
water the more water there is
pressing down on you therefor
the higher the water pressure
- There are problems that can come from
high water pressure, one of them is called
the bends, at high pressure levels a diver
starts to respire nitrogen and ther gases
into their bloodstream, these gas bubble
accumulate in the joints like the knee and
as the diver resurface the gas bubbles
expand causing agonising pain.
- Hydraulics
- Hydraulics is a way of increasing the
load force by using liquid. The liquid
is pushed through a syringe with a
small cross section area and is
pushed into a syringe with a larger
coss section area. Because the area
is bigger inn the second syringe this
multiplies the load force due to F=A*P
- Levers
- A lever is a rigid bar with a pivot that will increase the
effort by increasing the distance from the pivot point.
The longer the handle the greater the load force
- Levers are found everywhere in our lives,
some common examples are: Doors,
Elbows, Jaws, Scissors, Wheelbarrows
and many more!
- Moments
- A moment is the turning effect of a force
around a fixed point called a pivot, it will
either go clockwise or anti-clockwise
- Here is the
calculation
triangle for a
moment