Newton

Rules 2

Reaction distance and braking distance in a car

2.1

Distinguish between reaction distance and braking distance when a car comes to a stop.

Read: http://www.hk-phy.org/contextual/mechanics/kin/eq_mo01_e.html

2.2

List the factors that influence the reaction distance and braking distance for a vehicle.

Task 2.2a

Compile a list of factors that influence a vehicle's reaction distance and a list of factors that influence a vehicle's braking distance from the following resources and the article below:

Speeding factsheetHow fast is fast enough to kill? Most people are surprised to learn that driving even a couple of kilometres over the speed limit can have devastating consequences. Find out why. Explore these popular road safety topics on StreetSmarts.

https://streetsmarts.initiatives.qld.gov.au/speeding/factsheet

Extension 2.2a

Scroll down to work through the formula for calculating stopping distance in the article at right.
Perform the calculations for Car 1 travelling at 70km/hr

The physics of speeding carsSpeed is still the most common factor in fatal road accidents, accounting for more than half of all road deaths each year.

https://www.science.org.au/curious/technology-future/physics-speeding-cars

Task 2.2b

View videos: https://www.youtube.com/watch?v=t7911kgJJZc [3.11 mins]
https://www.youtube.com/watch?v=eUW5dGCdDd8 [1.00 min]
https://www.youtube.com/watch?v=1LFtoV4Q3Cw [0.46 mins]
https://www.youtube.com/watch?v=g96w_XOj4c8 [1.00 mins]

Y10 DTS Extra 5km per h Speed Kills.mp4

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Y10 DTS Factors Causing Crashes

Task 2.2c

Research to explain in terms of Newton’s laws how seatbelts, crumple zones and airbags reduce the effect of a collision.

Task 2.2d

If you would like, repeat the pre-test to see how your understanding has grown.

https://quizizz.com/admin/quiz/5ede0f176bd31c001b5be1d9/motion