## Simulation physics lab

## use explain

Read Introduce

Open up an existed lab:

We have edit some typical lab in the "lab" catalog. After you run <<simulation physics lab>> , you can use mouse to choose [document]---->[open] in the main menu, and it will spring out "Open lab" dialog box ; then you can choose one lab file and point [open] . It will open it.

Run and demo an edited lab:

You can open a lab by using the way upwards . There will show a menu of a lab's beginning ,from the menu you can understand this experimental condition setting . And each collocation of the experimental component ,original placement and original speed of the globule or particle's model . From the note ,you can know more information . When you run the lab ,you may point the [run]--->[run lab] of the main menu .The lab will run at once.<<simulation physics lab>> uses the movie to express the lab's content . In the demoing area head there will displace this experiment's time . When the experiment is running , most buttons are locked . And there are only [run experiment] , [pause] , [pause/ continue], and [multimedia] in effect .Point [play] , the experiment will come back to the original state , and begin to run again.

Point [pause] .the experiment will go back to the original state, and at this time you can edit or ament it. Point [pause/continue],the experiment will pause at this moment ,if you point it again ,it will continue run from that moment .And also you can point [multimedia] button to demostrate the movie, picture, voice and so on to assort experiment's effect.

Experiment setting:

Experiment setting set the current experiment collectivity parameter. Choosing [edit]--->[experiment set...] of the main menu, there will spring out "experiment set " dialog box (or use mouse to point shortcut button "set"). The "experiment setting "dialog box include:

- Function setting :

1: take the gravitation into account;

2: take the allure of the particle electricity into account;

3: take the universal gravitation of the particle into account;

4: take the simulational particle's collision;

5: take the theory of relativity;

6: display coordinate.

Choose these function ,simulation lab will calculate and dispose it when you run them.

- Setting the smallest time of the scan

In the simulation lab ,this is a very important parameter. The setting will have direct relation with the precision and the movie's speed .In the theory ,the time more little the experiment's precision will be more high. But it will use a mass of aculate time ,and the meno's speed will be slow either .When you research the macro world ,the scanning time can be set great .While in the microcosmic world ,it should be very little .For example in the experiment of the freedom dropping ,it is enactment at about 0.001 second ;and in the manmade satellite experiment it is about 0.1sec.While in the experiment of the electronical accelerale and gauche in the electric field ,the time should be about 1e-12sec.

- Setting scan times per pulse

It means in a close calculate , account the most little scan temporal time. For example ,the smallest time of the scanning is 0.001sec,and the scanning time is 100 per pulse. It will refurbish per 0.1sec;and the data of the output's speed and accleration is 0.1 sec also. It is bexoming to se t 100 in normal.

Adjust the experiment's component, ament the parameter:

In the editing state, you can adjust the created experiment's component and amend the parameter. By adjusting the component's parameter, you can derive a new experiment that they are relation with each other. Use the mouse's left key to point the experiment's component of the demostrate area and not set free. At the same time ,moving the mouse you can change component's position. And you can use the mouse's right key to point demostrate area's component ,there will spring out the correapondence component's parameter setting dialog box. In the dialog box , you can set the component's parameter nicety and comprehensive, and also you can delete the created component.

Output the data at the same time:

When you run the experiment ,you can output the appoint particle model's data, displacement ,speed ,acceleration. It will male you a all-around and quantitative understanding .In the editing state ,you can choose the mail menu [run]--->[output the data at the same time], the lab will clew you the particle model that you want to output it ,at the moment you can use the mouse's left key to point the demostrate area's correspond particle. Choose the "Not output data", the experiment will not output the data when it is running .making certain! And when you run it again ,it will output the correlation data .

The experiment component's function and using:

Simulation physics lab offers abundant experiment equipment and condition. you can creat all kinds of the experiments by setting and arranging the equipment and condition . and it will give you a infinite imagine space. In the simulation physics lab there are all kinds of experiment component : partical model ,spot charge ,universal gravitation, electric field, magnetic field ,damp medium, hanging spring, link spring, rope,firm pole, beeline railway and circularity railway, note board. Intrducing the experiment component and using separate underside

Particle model :

Particle model is athletic carrier, and also is the object of our research. In the movement and dynamics experiment the particle model is very nessisery. In the dropping freedom ,throwing calm it can be a pute particle; in the momentum observe judge's experiment it can be a globule with radius; in the accelerate electric field experiment ,in the magnetic field the particle is used with eletric. Setting the parameter in free , you can get the flexible using.

Particle eletric :

Particle eletric is a experiment component with some eletrity , in the experiment it is in the place that is setted use its eletric to atract or arrange the eletrical particle model.

Universal gravitation centriod:

The universal gravitation centriod has the auality only. In the experiment its place is not change forever. For example in the manmade astellitic experiment.You can use it simulate the earth .In the experiment of the earth running around the sun ,it can simulate the sun.

Uniformity electric field:

It is like the reality experiment's Uniformity electric field,it can accelerate the eletrical particle,deflexion the eletrical particle ,and look how the fluorescence working.You may arrange the it with the eletrical particle in groups ,and design the particle accelerogh and so on experiment set.

Uniformity magnetic field:

When you research the electrical particle ,it is very necessery.

Damp field:

It hold back the particle that enter the damp field by compulating it.In the air ,why the feather drops slower than the stone ,and in the dropping free experiment ,you can see the effect by setting a damp field. It is necessery either in the damp surge experiment.

Pensile spring:

One side of it is fastness ,the other side connect with a model . For example :in the spring shake experiment, it is used pensile spring .You can use the spring to simulate a rope or pole,if the spring's contumacy coefficient is great enough. The rope simulated by the spring can be used in the single pendulum or famous Newton pout experiment.

Link spring:

The tow sides is connected with tow particle model.

9. Rope:

The characteristic of the simulate rope.

10, Pole:

Simulate the rigidity pole's characteristic.

11. Rectilineal track:

Let the globule across the Rectilineal track ,the globule will play along the Rectilineal track.Rectilineal track and circular track may connect with each other.In the momentum defend experiment the action of the track is stick out a mile. The track can use as a stretch board. When the globule hit it , the globule will rebound .The track will cut no ice when it deal with a particle without the radius.

12. Circular track :

It's shape is circulaty arc.The characteristic like the Rectilineal track.

13. Remark:

It is used demo the setting letter and the denotation. You can use the remark to explain and introduce your experiment.

> Make you own experiment: * * *

> The one of the thousand of the 《simulate physics lab》is it can make you to make all kinds physics in easy. You can make a single pendulum or a spring shakeing a minute; and you can make a experiment in tow minutes; also you can make a particle accelertor's model in a few minutes. We will make some experiment to explain the method and step.

> 1th.Dropping free and throwing flat playing.

> 1.Run 《simulate physics lab》, point at the mail menu [document]--->[new](or point at [new]'s shortcut button). (Some time it will spring out a dialog box to ask whether you will save the dialog box in existence.)

> 2.It will show a coordinate reticle ,and show the clew information in the below of the forms" use the mouse to make sure the srigin place." Before make the experiment ,it is important to set the coordinate apt .It will put the experiment component for you and offer the benchmark of the experiment.Move the mouse in the experiment area,and reticle moves correspond .Point at the mouse's left key, you can make sure the coordimate location. In this experiment ,we can put the origin in the submit of the left.

> 3.Now sprint the " coordinate scle set"dialog box.In this dialog box ,you can choose the screen to demo the reality experiment. Choosing the appropriate scale can help you to gain benign demu effect. For example :when you make a satellite ,you can choose 1.2e7 meter .When you make a sigle pendulum experiment , you should choose 0.5 meter.In this experiment , we choose 2 meter.

> 4.Then we can dispose the experiment component and the exoeriment condition .At this time it will spring out a "establish cyclostyle" tool,with it you can creat all kinds of experiment component and the condition. At first you can creat a dropping free globule :and use the mouse point at the [simulate particle ] button of the "establish cyclostyle", or you can choose the [edit]--->[creat]--->[simulate particle].Moving your mouse ,pressing the mouse's left key and put the globule to the summary place(please refer to the information in the below of the window), in this experiment we put this globule in the coordinate's origin ,and it will spring out a "simulate particle setting " dialog box. In this bialog box ,you can deplay the globule's parameter. In the dropping free eperiment and the throwing flat experiment you should set the parameter as: quality M=1.0kg,radius R=0.1m . electricity Q=0coulomb. original displacement X=0,Y=0. original speed Vx=0,Vy=0. Use the mouse to choose the "display the play track",it will draw the globule's ;playing track when run it.At last you may point at the [sure] button, a globute model has been created.

> 5. You can use the same way to creat the 2cn globute ,and let it run as throwing flat.And set the parameter as:quality M=1.0kg,radius R=0.1m,electroform Q=0coulomb,original displacement X=2,Y=0. original speed Vx=10m per sec , Vy=0.

> 6.Now you can set the gravitation circumstance and the demu experiment's precision. In the mail menu you may choose the [edit]--->[experiment set],or use the mouse point shortcut button[set up], it will spring out "experiment set" dialog box. Choose the "calculate gravitation" and "show the coordinate",In the experiment , you should set the "experiment compute step time " as 0.0001sec. And the "how many steps to be dealed together " is set as 100. At last you can point the [sure] button and finish the setting .

> 7: Now the experiment has been finished ,now you can run the experiment . In the demo , you can adjust "how many steps to be dealed together " and "experiment compute step time" basing on the demo effect .

> 2cn.Single pendulum experiment:

> 1:Point the [new] shortcut button,ans creat the experiment.

> 2:Make sure the experiment's coordinate: put the coordinate's origin to the top of the location: and choose the coordinate's proportion as 0.5 .

> 3:Creat a particle ,put it in the (-0.5,-1) location ;and set its qulity M=1kg, radiu R=0.02m.

> 4:Creat an append spring (you can creat an append spring in the in due form edition). And you can connect the single pendulum particle ,and put its another side in the (0,0) basesing the note in the below of the widow. Spring out "hanging type spring set"dialog box,you can set the spring's parameter as :the fastness side X=0,Y=0; contumacy parameter K=100000;the spring's original long L=1.1180m; and the act condition "when draw it run". At last you point the [sure] button .

> 5:OPen the "experiment set" dialog box, and choose "calculate the gravitation","the limit time of the scannig" and set it as 0.0005, "how many steps to be dealed together" is set as 100. Make sure.

> 6:Run the experiment , you can try to output the date at the moment.

> 3rd.The action of the electric field to the eletric accelerate and the deflexion experiment:

> 1:Point the shortcut button [new], creat a new experiment.

> 2:Make sure the experiment's coordinate:put the origin to the demo window's below-left location;and choose the coordinate scale 0.025.

> 3:Bases on the note and creat a uniformity electric field as an accelerate eletric field, and spring out the"uniformity electric field set dialog" ,then set the parameter as : superior border =0.05, descend border =0, left border =0.right border =0.025; and the eletric frield intension E=1e4(the science caculate of the computer, and it is equal to 1*10000); eletric field aspect =180consideration .At last make sure.

> 4:Then creat a deflexion eletric field.And set its parameter as: superior border =0.05, descend border =0, left border =0.025,right border =0.1; and the eletric frield intension E=2e3(the science caculate of the computer, and it is equal to 2*1000); eletric field aspect = -90 consideration .At last make sure.

> 5:Creat a particle model as a researched object -----eletric. Put this eletric to (0.001,0.025);and set the parameter as : quality M=0.9kg,radius R=0.1m,electroform Q=1.6e-19coulomb,original displacement X=0.001,Y=0.025. original speed Vx=0m per sec , Vy=0 m per sec.At last make sure , and a eletric has been created.

> 6:Open the "experiment set" dialog box, "the limit time of the scanning " is set as 2e-12 sec ,and the "the scanning time of per plus" is set as 100. Sure.

> 7:You have created a experiment again, and you can add some note to your experiment . Ofcause you can run it now.