# NTNUJAVA Virtual Physics LaboratoryEnjoy the fun of physics with simulations! Backup site http://enjoy.phy.ntnu.edu.tw/ntnujava/

## Easy Java Simulations (2001- ) => Collaborative Community of EJS => Topic started by: engrg1 on October 07, 2012, 09:12:00 pm

 Title: Primary School Speed Time Post by: engrg1 on October 07, 2012, 09:12:00 pm Have created a simulation for teaching of speed in Primary School.Based this simulation by getting ideas from :(1) The simulation by Prof Huang and Lookanghttp://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=2072.0Features in this simulation:(1) In "slow-down" mode when the objects are about to collide or reach either Towns.     (This is to ensure that the time for the actual collision or to reach town is as accurate as possible)(2) Allows user to input the starting position and starting time.(3) Shows the various distance (like distance from Town A, distance moved) to highlight the concepts of speed.Teaching ideas with this simulation :(1) Teacher to use this to demonstrate the concept of speed by showing them visually. Let them see how the formula (distance = speed * time) works and what happens during collision.(2) Students to "play" with the applet to get conceptual understanding of speed.  Title: Re: Primary School Speed Time Post by: lookang on October 08, 2012, 08:56:32 am looks great!good to include sample questions to test whether your computer model can handle the scenarios.there is a typom instead of km on all the main window text Title: Re: Primary School Speed Time Post by: engrg1 on October 08, 2012, 02:52:34 pm Thanks, Lookang.I have made the necessary changes.Here are some of the typical questions that you can use:(1) Town A and Town B are 1000 km apart. The speed of the red object (at Town A) is 50 km/h while the speed of the blue object (at Town B) is 100 km/h.Both the objects start moving at 9 a.m. What time do they meet?(2) Both objects are at Town A. They start at the same time. The speed of the red object (at Town A) is 50 km/h while the speed of the blue object (at Town B) is 100 km/h. What is the distance between the two objects after 3 hours? Title: Re: Primary School Speed Time Post by: engrg1 on October 08, 2012, 07:01:47 pm Possible teaching ideas:(1) Click the "Stop Every Hour". Get the students to see what happens every hoursPossible questions to ask:Where is the object after 1 hr?Where is the object after 2 hr?Can you see the pattern?(2) One of the typical question is to see what is the distance between 2 objects after some time.Get them to see the relationship between the difference in speed and the distance between 2 objects(3) Collision or when they meet type of question?Get the students to articulate what do they observe when the two objects meet? Possible hints: What is the distance in distance between the two objects?If the objects are moving in opp direction, what is the distance between Town B and obj1 and Town A and obj2?If the objects are moving in the same direction, what is the distance between Town B/Town A?(4) Use the simulation to highlight the difference between the position of the object (i.e., distance with reference to Town A or B) and distance moved. Title: Re: Primary School Speed Time Post by: engrg1 on November 18, 2012, 03:57:20 pm Further enhance the previous version to make it "more open" and fit more situations.Modifications:(1) Range of values (speed, town, start pos) possible. Users key in values(2) Accurate calculation of meeting time with the use of events in Evolution (Finally , force myself to learn this:-)) Thank lookang for pointing that out !(3) Message to be displayed when the simulation is paued. Title: Re: Primary School Speed Time Post by: engrg1 on December 26, 2012, 08:15:49 am Dear all, another major revamp of the speed simulation for primary school.Added in new features:(1) Display working for the distance traveled.(2) Allow user to pause the simulation at specific timing or specific distance. Users can change the speed.For more details about the simulation, please refer to the short write uphttps://docs.google.com/document/pub?id=163jjwlQEqmmG2wf6Z0C3AcQI0TXHVCXX1e3F9QOlbus Title: Re: Primary School Speed Time Post by: engrg1 on February 08, 2013, 07:01:56 pm Changes made (as requested by teacher):Convert the time into hour and min (as per the primary School Maths Syllabubs)