Chiang Mai Rally Chiang Mai Rally Velocity Episode 3: Velocity

2 Understand the concept of velocity. Calculate the velocity of a car. Carry out an experiment to compare speed and velocity. Understand the difference between speed and velocity. Objectives: Chiang Mai Rally Velocity

3 Engage You have done a great job! Now we have the best route for the Chiang Mai to Chiang Rai Rally.

Chiang Mai Rally Velocity 4 Engage We are keen to make the rally the number 1 TV show for Thailand. We want to put some figures on the screen to tell our viewers just how fast our cars are going. But which figures would be better: speed or velocity?

Chiang Mai Rally Velocity 5 Engage We would like you to advise us on what figures we should show the viewers.

Chiang Mai Rally Velocity Engage 6 Velocity is the displacement of an object in time. displacement in a given direction time taken to move Velocity =

Chiang Mai Rally Velocity 7 Engage Velocity will not only be measured in cm/s, m/s or km/h but will also refer to the direction, for example: 80 km/hr north west Velocity will not only be measured in cm/s, m/s or km/h but will also refer to the direction, for example: 80 km/hr north west Does the speedo on a car dashboard show speed or velocity? Why?

Chiang Mai Rally Velocity 8 Explore How would the speed and velocity results differ for straight and winding parts of the race? Carry out an experiment in the lab to model and explore this. SS1

Chiang Mai Rally Velocity 9 Explore Use the equipment to carry out the experiment and then present your results and conclusions to me. Which set of figures give a 'better' picture of what is happening? Why? SS1

Chiang Mai Rally Velocity 10 Explain Circle the velocity results on your results table in blue and the speed results in black. When was there greatest difference between the speed and velocity results? Were there any times when the speed and velocity results were the same? When would you expect the speed and velocity results to be the same? Why would this happen? How do speed and velocity differ?

Chiang Mai Rally Velocity 11 Elaborate The car went in a complete circle around the roundabout. It started and stopped in the same place. The circumference of the roundabout was 50m and the car completed it in 10 seconds. What was the speed and velocity of the car?

Chiang Mai Rally Velocity RouteDepartArrival Displacement (km) Bangkok - Phuket Bangkok - Chiangmai Bangkok - Khornkaen Elaborate Schedule of domestic flight in Thailand, Thai Airway. Update 15 / 01 / Our drivers fly from different parts of the country for the rally. What are the velocities of the planes on the different flight routes? SS2

Chiang Mai Rally Velocity 13 Evaluate Write a report for the organising committee to advise them on which figures, speed or velocity, they should display on the TV screen during the race: On which type of sections should they display these figures? Why should they select these sections? How can they carry out their measurements to obtain these figures? Why should they measure them in this way? Use illustrations and example results from your experiments to support your report.

Chiang Mai Rally Velocity 14 Contact Details Contact the Inspiring Science team at