1. U4L2 - Page 242, questions 1 and 2 1. A 50 kg female who has two drinks will have a BAC level of 0.09. How long will it be until she will be able to drive?

2. 2. Joby drank some whisky with his friends after winning a football game. He weighs 100 kg. His BAC level was 0.117 after six drinks. How many hours must he wait before legally being able to drive?

3. Review, Page 248, #9 and 10. 9. A 90 kg male who has four drinks will have a BAC level of 0.087. Calculate how long he will have to wait after his last drink until he can legally drive. Show your thinking and calculations. Ans. current BAC = legal limit for BAC while driving = 0.08 amount of BAC that has to leave system = rate at which BAC leaves system = 0.015/h He will have to wait a little more than ________until his BAC is low enough to drive legally.

4. 10. A 65 kg female who has five drinks will have a BAC level of 0.146. How long after her last drink can she legally drive? Show your thinking and calculations. Ans. current BAC = legal limit for BAC while driving = 0.08 amount of BAC that has to leave system = rate at which BAC leaves system = 0.015/h She will have to wait a little more than ________until her BAC is low enough to drive legally.

5. d = distance in kilometres (km) or metres (m) t = time in hours (h) or seconds (s) v = velocity in km/h or m/s

6. Pg. 255 – Complete “Solve These” together. #1. It is 10 metres from the back of the pool hall to the front door. If you travel that distance in 30 seconds, how fast are you travelling in m/s? 1. What do you know? d = t = v = 2.What do you want to find out? 3.How do you find out? 4.Show the velocity as distance per time. V = 10m/30s =.33 m/s I would be travelling at.33m/s

7. Pg. 255, Solve These #3. To get home you drive 25 km in half an hour. At what velocity are you travelling?

12. Pg. 263, Solve These#1 What distance will you travel in 2.3 h at an average of 56 km/h?

13. “Check Your Understanding”, page 263. #1. According to the average velocities shown in the log book, how far did the truck travel between 11:30 and 12:00?

14. Pg. 263, #2. According to the average velocities shown in the log book, how far did the truck travel between 6:00am. And 7:30am?

15. 3. A dog trots along behind a cowgirl’s horse at 6 km/h. It takes the cowgirl three hours to get back to the ranch after checking the herd, but she takes half an hour of that time for lunch break. How far did the dog trot?

16. 4. (a) If you travel 60 km/h for two hours, then an average of 30 km/h for half an hour, then 100 km/h for half an hour, how far have you traveled?

17. 4. (b) Write a scenario to explain where you might have traveled at these velocities.

18. Stopping distance has two components: 1. The driver’s reaction time – the distance a vehicle travels between the time the driver sees a problem and ten reacts to apply the brakes; and 2. The vehicle’s braking distance – the distance the vehicle travels after the brakes have been applied but before the vehicle stops.