# AP Physics 2: 1.1 Probability and Systems

AP Physics 2: 1.1 Probability and Systems. How much work is done on the second piston?

AP Physics 2 | Probability and Systems |

Language | English Language |

Science Practice 4 | Using data collection strategies |

### Transcript

the first pissed and has an area's Five meters squared

and is depressed forty centimeters by the force of fifty

newtons How much work is done on the second kissed

in which has an area of ten meters squared by

the fluid when the first piston is depressed all right

there's Potential answers right Answer this We need to employ

pascal's principle Talked about plays pascal before but we don't

mind talking about him again Because while seriously plays pascal

coolest name ever telling a gunslingers or fashion anyway pascal

stated the change in pressure and enclosed fluid is transmitted

equally and unchanged Toe all points within that fluid This

makes sense since you can't compress the liquid it's Just

not possible to make a leader of water shrink down

Tto only take up half a litre of volume Not

even the strongest person alive Sorry arnie If you squeeze

In close fluid pressure of you're squeezing will be allied

everywhere within that container Want a real life example Well

it's going to go The old toilet plunger let's say

our baby sister flushes are physics homework in calm rational

physicists are first course of action is to see if

we can trade her in for a puppy Regardless of

whether or not our sister is getting bids off there

on ebay way Still need to get the toilet working

We'll take our trusty plunder and apply force Since the

toilet's stopped we haven't contained fluid A force to be

applied The plunger is transmitted through the fluid without diminishing

Because the walls of the piper strong enough to resist

the pressure Most of the force is applied to the

physics homework forcing it through the pipe van into the

sewers It means our genius will continue to go unrecognized

What is all this relate to our problem Well it's

like it's Time to do some math first we need

to find the pressure created Pressure equals force divided by

area force of fifty Newton's has supplied the first piston

which has an area of five meters squared The pressure

Created by the first fists and equals ten scouts to

find the force acting on the second pissed And we

just re arrange that for me Force equals pressure times

area with a pressure of ten pascal's in an area

of ten meters square The force acting on the second

pissed and equals one hundred years We're doing some good

work here so we can work let's calculate that next

that's what we call a sick way people smoother then

blaise pascal himself work is force multiplied by distance so

we need to know how high the second pissed and

will rise do that We couldn't figure out how much

water is being displaced by the first pistol volume equals

area times distance which in this case is a change

in height Like in the numbers we find the displaced

volume equals two cubic meters and that same volume is

what who's the second pistons The change in high that

the second pissed and equals the volume of water divided

by the area long last we can calculate the work

done quickly said way back when work equals force times

distance forces one hundred newton's on the change in distance

is point two meters so the work done equals twenty

jules correct answer is that we used conservation of energy

We could've saved ourselves a whole lot of trouble by

just determining the work done on the first piston worked

on on the first piston equals fifty newness times point

four meters which surprise surprise equals twenty jules But if

we had just on that first place we wouldn't get

all the other equations and well that's no fun work 00:03:38.7 --> [endTime] Seven might have a strange idea of fun