Author Topic: Misconceptions of Kinematics and Dynamics  (Read 11608 times)

lookang

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Misconceptions of Kinematics and Dynamics
« on: August 16, 2012, 09:16:11 am »
Misconceptions of Kinematics and Dynamics by Lee TL and his students
for workshop http://weelookang.blogspot.sg/2012/08/lee-tlwee-lk-2012-17august-physics.html

to note:
project name cannot have . inside
rename from Interfacev.5.ejs to Interfacev5.ejs can deploy in NTNU

to save your .ejs into in workspace such as
C:LooKangworkspacesourceuserssgeducationlookang
must be workspacesourceusers
sgeducation is good to use
lookang is a folder for all your models, choose one that suits you like engrg1

Full screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list
Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
  • Please feel free to post your ideas about how to use the simulation for better teaching and learning.
  • Post questions to be asked to help students to think, to explore.
  • Upload worksheets as attached files to share with more users.
Let's work together. We can help more users understand physics conceptually and enjoy the fun of learning physics!
« Last Edit: August 22, 2012, 01:11:44 pm by lookang »

engrg1

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Re: Misconceptions of Kinematics and Dynamics
« Reply #1 on: August 19, 2012, 12:53:13 pm »
Hi, all.
Have made some changes to make the simulation be more dynamic

(1) Frictional force will change according the the impact force (if limiting friction not reached)
(2) Make the box and the man appear at all time. (Can use this to show the students even if the resultant force is the same, the man is taking shorter time to move the same distance as the velocity is increasing)


As usual, have difficulty in embedding the jar file.
I have already placed it in
sgeducationengrg1FrictionLsy

and name the ejs File as FrictionLsy.ejs

Then, I compile the jar file with the name ejs_FrictionLsy.jar

Not too sure which step I have done wrong again.



« Last Edit: August 19, 2012, 01:24:44 pm by engrg1 »

lookang

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Re: Misconceptions of Kinematics and Dynamics
« Reply #2 on: August 22, 2012, 01:09:59 pm »
Hi, all.
Have made some changes to make the simulation be more dynamic

(1) Frictional force will change according the the impact force (if limiting friction not reached)
(2) Make the box and the man appear at all time. (Can use this to show the students even if the resultant force is the same, the man is taking shorter time to move the same distance as the velocity is increasing)
the physics of friction is still not correct.
i tried moving then change pushing force to zero, the motion suddenly becomes zero velocity, it should obey 2nd newton law still.


As usual, have difficulty in embedding the jar file.
I have already placed it in
sgeducationengrg1FrictionLsy

and name the ejs File as FrictionLsy.ejs

Then, I compile the jar file with the name ejs_FrictionLsy.jar

Not too sure which step I have done wrong again.





E:workspacesourceuserssgeducationlookang
i notice u should have used "users" not "user".

engrg1

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  • Posts: 69
Re: Misconceptions of Kinematics and Dynamics
« Reply #3 on: August 26, 2012, 01:49:59 pm »
My latest try in embedding..

Full screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list
Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
  • Please feel free to post your ideas about how to use the simulation for better teaching and learning.
  • Post questions to be asked to help students to think, to explore.
  • Upload worksheets as attached files to share with more users.
Let's work together. We can help more users understand physics conceptually and enjoy the fun of learning physics!

engrg1

  • Jr. Member
  • **
  • Posts: 69
Re: Misconceptions of Kinematics and Dynamics
« Reply #4 on: August 26, 2012, 01:53:43 pm »
Hi, all.
Have made some changes to make the simulation be more dynamic

(1) Frictional force will change according the the impact force (if limiting friction not reached)
(2) Make the box and the man appear at all time. (Can use this to show the students even if the resultant force is the same, the man is taking shorter time to move the same distance as the velocity is increasing)
the physics of friction is still not correct.
i tried moving then change pushing force to zero, the motion suddenly becomes zero velocity, it should obey 2nd newton law still.

Should be working now. Do check out the embed applet. When the push force is 0, it will take some time before it comes to rest.

As usual, have difficulty in embedding the jar file.
I have already placed it in
sgeducationengrg1FrictionLsy

and name the ejs File as FrictionLsy.ejs

Then, I compile the jar file with the name ejs_FrictionLsy.jar

Not too sure which step I have done wrong again.





E:workspacesourceuserssgeducationlookang
i notice u should have used "users" not "user".

[/quote]

Thanks, Lookang for spotting the mistake. Finally, I can embed..

engrg1

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  • Posts: 69
Re: Misconceptions of Kinematics and Dynamics
« Reply #5 on: October 23, 2012, 11:19:36 pm »
Feedback from teacher:
Need to slow down the simulation or "step".

Put these features in

Full screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list
Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
  • Please feel free to post your ideas about how to use the simulation for better teaching and learning.
  • Post questions to be asked to help students to think, to explore.
  • Upload worksheets as attached files to share with more users.
Let's work together. We can help more users understand physics conceptually and enjoy the fun of learning physics!
« Last Edit: October 23, 2012, 11:22:42 pm by engrg1 »

lookang

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Re: Misconceptions of Kinematics and Dynamics
« Reply #6 on: October 23, 2012, 11:55:15 pm »
hi prof hwang,

can make engrg1 a moderator to this board too?

this can help engrg1 to manage updated versions of the simulation always on the top post.

thanks!