What is drifting Some example videos httpswwwyoutubecomwatchvj3MAmVpAbEo httpswwwyoutubecomwatchv T95p7aGg6l4 https wwwyoutubecomwatchvVaFiAt7aPBM Disclaimer It is actually illegal to drift on the streets ID: 1026166
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1. The Physics of DriftingChapman Kwan
2. What is drifting?Some example videos:https://www.youtube.com/watch?v=j3MAmVpAbEohttps://www.youtube.com/watch?v=T95p7aGg6l4https://www.youtube.com/watch?v=VaFiAt7aPBM
3. DisclaimerIt is actually illegal to drift on the streets!But you can do this in certain places with professionalsOr you could drift on a remote controlled car like me!
4. AgendaHistory and usesThe PhysicsThe demonstrationThe applicationThe discussion
5. Goals for this presentationWhat is drifting?Understanding the PhysicsHow the Physics is appliedWhat does this application tell us?
6. A little historyCreated in 1970 by the champion of the All Japan Touring Car ChampionshipKunimitsu TakahashiPhoto from: https://www.motorsport.com/driver/kunimitsu-takahashi/Photo from https://en.wikipedia.org/wiki/Keiichi_TsuchiyaKeiichi TsuchiyaPresented this style of driving in the mountains of Japan, which started an era of mountain racing and drifting
7. So what is drifting?It is a manoeuvre that automobiles can perform during any turnThe most common type of turn for drifting is the 180-degree change in directionPhoto from: http://go-kart-source.com/wp-content/uploads/2014/07/Turn-Types.jpg
8. BUT WHY?
9. Because drifting is…COOL!But really though,Is drifting faster? Is it more effective?It is not necessarily faster than making a regular turnBut there are some advantages to drift in specific turns like the hairpin
10. Why?Drifting is more advantageous because:Enters the turn at a higher velocityOn exit, car is already facing the direction of travel!Blocks off some of the track so people can’t overtake
11. Retrieved image from: http://www.zhutek.com/photos/alpinetour/images/image080.jpg
12. Retrieved image from: http://www.zhutek.com/photos/alpinetour/images/image080.jpg
13. Rally races (often on dirt roads) have less tractionLess traction allows vehicles to drift easily
14. The PhysicsNewton’s Laws of Motion Inertia Force Action-reactionCentripetal Force
15. Newton’s Laws of MotionFirst Law:Every object will remain at rest or in uniform motion in a straight line unless compelled to change by the action of an external force.Second Law:Force is equal to mass times the change in velocity per change in time.Third Law:For every action, there is an equal and opposite reaction.
16. Centripetal ForceObjects in circularmotion experiencea force towardsthe center of thecircle in which it istraveling in Formula from: http://hyperphysics.phy-astr.gsu.edu/hbase/cf.html
17. Centripetal demonstrationBall on a string
18. When I swing a mass withthe string attached, themass will move in acircle if I keep my endin place
19. As I swing with a constant speedthere is a constant centripetal forceacting on the stringForcevelocity
20. Forcevelocity
21. The demonstrationLet us begin by looking at what a drift looks like in real life!
22. Prediction!What if we don’t drift but we go at it at a high velocity?
23. I have a video recording of this demonstration in birds-eyes-viewSlowing down the video we can take a look of the manoeuvre in detailThe demonstration
24. Applying the Physics As a car begins to moveThe car has an accelerationSo the car has a ____force CARHere we have Newton’s Second Law
25. Applying the PhysicsCARAs a car approaches circular motion (like the hairpin)Hairpin turns are semi-circular motions, so if a car travels with a constant velocity (while turning) the car will experienceCENTRIPETAL FORCE
26. The car experiences__________ forcewhen the car makes a turnThe force has the same_________throughout the entirecircular pathWhat changes is the_________ of travel (velocity)Applying the Physicsmagnitudedirectioncentripetal
27. Thus,whether the car turnsregularly, or turns bydrifting; the car will experience the same centripetal force throughout the samedesignated pathApplying the Physics
28. The ultimate difference between these two ways of turning is the speed at which the car can travelApplying the Physics
29. Centripetal force is the resulting forceRather than a force that is directly applied to the carAs a car starts from 0 m/s to 15 m/s in a straight line, the applied force is its change in accelerationApplying the Physics
30. Applying the PhysicsThe red arrow is similar to the tension force on the string attached to the ornament we discussed earlier!
31. Applying the PhysicsThe car has applied forces (accelerates) upon entries and exits of the turnThe car experience the result of centripetal force as it changes direction during the turnThe car is able to make a quicker change in direction by using this manoeuvre
32. Quick Calculation in the worksheet!
33. Take home messagePhysics is applicable to everything!Experience all of Newton’s laws of motion at all moments of our timeCentripetal force is something that occurs in driving(Even in our daily driving) but also in other actionsDrifting may look cool, it has some benefits, though it just follows the same rules as regular turning!