SpeedSimulationShortWriteup

Big Idea behind this simulation

- To allow the students to have a strong conceptual understanding of speed.

- To illustrate speed problem.

- To illustrate the concept of average speed.

- To allow the students to conduct inquiry-based activities to deduce the the relationship between speed, time and distance

- To allow the students to conduct inquiry-based activities to deduce the the relationship between the ratio of the speed and the distance between 2 objects given the same time travelled.

A car travelled at a speed of 60 km/h for the first 1 hrs and then at 75 km/h for the next 2 hours.

What is the average speed ?

Use the red object to demonstrate the actual movement of the car.

Use the blue object to demonstrate the actual speed.

- The students may need to unpack the questions and do some necessary conversions before using this simulation.

Things to note

1. When entering the value into the text field, please remember to press “Enter”. The field will turn white as shown below.

Without pressing enter (Text box remained yellow)

Upon pressing Enter (Text box turn white)

Pausing Simulation

1. Every Hour (For Conceptual Understanding)

Possible use:

- To show the distance travelled every hour and let the students deduce the relationship between speed, distance time. Let them record some values and come to some conclusion

- To show how the distance between the two objects changed every hour and deduce the relationship between this distance, the difference in speed and the time . Let them record down some values and come to conclusion

- To reason out the relationship between the ratio of speed, ratio of distance travelled between the two objects with the same time travelled. Students will need this strong understanding to solve complex speed problem.

2. At specific timing

Possible use:

- Pause the simulation to change the speed as speed cannot be changed when the simulation is playing. Use this to illustrate the problem.

The distance between A and B was 270-km journey. John started driving from Town A. He drove at a speed of 80 km/h for the first 1.5 hours. For the rest of the journey, he drove at a speed of 60 km/h. How much time did he need to complete the journey?

3. At specific Distance

Possible use:

- Pause the simulation to change the speed as speed cannot be changed when the simulation is playing. Use this to illustrate the problem.

The distance between A and B was 300-km journey. John started driving from Town A. He drove at a speed of 100 km/h until he has travelled 125 km. For the rest of the journey, he drove at a speed of 60 km/h. How much time did he need to complete the journey?

Distance

1. Distance only shown when simulation is stopped

2. Option to display the distance info. Allows the teachers to focus on the given point.

3. Display working. Show how the distance is calculated. (You can use this feature to let the students infer how the working is derived. Have deliberately show how duration of time is measured , i.e. final time- initial time. Perhaps it is a good habit to teach the kids so that they would be more mindful of how the variable, t (time) is calculated).

4. The unit for distance is kilometer (km)

Speed

1. Speed set between 40 km/h and 150 km/h.

2. Allow to U turn only once.

3. Speed set to 0 when reached Town A or Town B if no U turn is not set or the object has already U-turn once. Student will not be able to change the speed again.

4. In the current simulation, the speed has to be in km/h . (Note : If there is a need, we can convert to min/s)

Time

1. The unit is in hour. The input must be in decimal form.

2. There is a need to convert min to hour.

3. Cannot specify timing like. 9.00 a.m.

Variables that cannot be changed once the simulation has started

You will need to reset the simulation to change the variables again.

1. Distance between 2 towns

2. Start position

3. Pause simulation

4. Direction (Left Or Right)

5. U turn