Hydraulics
Challenge your friends to hold down the plunger of the large
(10ml) syringe while you push down on the plunger of the small 2.5ml syringe. Strange
that a small piston can generate so much force.
dynamicscience.com
Multiplying
the force
Using a 10 ml and a 2.5 ml syringe lift a 10kg brick with as little effort as possible.
Which set up would you use?
2.5ml syringe is used to push the 10ml
syringe.
The 10ml syringe is used to push the 2.5ml
syringe. This system can hardly budge the
brick.
The hydraulic system above can lift the
brick with little effort. The effort is magnified by this system
The system on the left can hardly budge the
brick.
Even though the brick may be lifted higher,
this hydraulic system cannot generate the force required.
Explain how the hydraulic system above can
multiply the effort to lift the brick. Click for extra, vital information.
Multiplying the force or distance
activity.
Construct the hydraulic system
on the right.
Challenge your friends to hold
down the plunger of the large (10ml) syringe while you push down on the plunger
of the small 2.5ml syringe.
Strange that a small piston can
generate so much force. Click for further information
Connect a 2.5ml syringe to a
10ml syringe as shown.
Design a hydraulic system to
lift a small mass, maximum distance off the ground with as little movement from
the controlling syringe as possible.
Click to see a 120kb movie.
Hydraulic Pressure
Pressure produced by the effort piston passes through the
fluid (water) to the load's piston.
This piston has a larger area and so the pressure from the
smaller piston presses on a larger area.
This produces a larger force, in this case 5 times the force.
http://www.dynamicscience.com.au/tester/solutions1/hydraulicus/hydraulics.htm
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