1. What we will do What we will learn 10N 04 Hongongoi 2017
Quick quiz and preliminaries
How to start well
Revisit the effects of wet roads on driving.
How to talk about the effects of water on braking distance and the changes needed to be made for safety
Revisit acceleration and the building of the formulae: a=F/m and F=ma
What the formulae represent
Do some examples of a=F/m and F=ma
How to USE the formulae.
If time, start on some practice questions to boost our test scores
How to handle test-level questions

2. Yesterday was Liam’s birthday
Important Notice
Yesterday was Liam’s birthday

3. 10N – Seating Plan
Front of lab - Whiteboard

4. HW item Skills practiced Marking of the Electricity (notebooks)_
Due Thurs 1 June
How our bookwork stacks up
Up to LHS of staple in HW booklet
Due Thurs 8 June 2017
Current and Static electricity
Second half of HW book
Due Monday 12th of June 2017
Current and static electricity
EOT test
Due Thursday 8th of June 2017
Hiko
Pages 1 – 25 of Motion booklet
Due Pd 2, Thursday 27 July 2017
Movement, forces and acceleration

5. Total stopping distance (m)
Speed (m/s)
Speed (km/hr)
Speed (mph)
Thinking distance (m)
Braking distance (m)
Total stopping distance (m) 10 36
22.5 6 8 14 15 54
33.75 9 18 27 20 72 45 12 32 44 25 90
56.25 50 65 30
108
67.5

7. Questions:
What is meant by the term “reaction time” when you are driving a car?
Name two things that could increase a driver’s reaction time
Name two things that could increase a car’s braking distance
Distance=speedxtime. If going at 20 m/s and having a reaction time of 0.6 seconds, what is the thinking distance?
Distance=speedxtime. If going at 25 m/s and having a reaction time of 0.6 seconds, what is the thinking distance?
Why does the thinking distance go up if the driver’s reaction time stays the same?
Build a paragraph about (Discuss) the effects of of wet weather on road safety. Include how wet weather changes braking distance and any recommendations for drivers to ensure safety in wet conditions.

8. Question 1 and its answer
What is meant by the term “reaction time” when you are driving a car?

9. Questions 2 and its answer
Name two things that could increase a driver’s reaction time

10. Question 3 and its answer
Name two things that could increase a car’s braking distance

11. Question 4 and its answer
Distance=speedxtime. If going at 20 m/s and having a reaction time of 0.6 seconds, what is the thinking distance?

12. Question 5 and its answer:
Distance=speedxtime. If going at 25 m/s and having a reaction time of 0.6 seconds, what is the thinking distance?

13. Question 6 and its answer
Why does the thinking distance go up if the driver’s reaction time stays the same?

14. Question 7 and its answer:
Build a paragraph about (Discuss) the effects of of wet weather on road safety. Include how wet weather changes braking distance and any recommendations for drivers to ensure safety in wet conditions.

17. A 2kg lab trolley accelerates at 5 m/s2
A 2kg lab trolley accelerates at 5 m/s2. What force is needed to make this happen?
A 600kg smart car is pushed with a force of 1200N. What is its acceleration?
A 45000kg (45 tonne) Kenworth is also pushed with a force of 1200N. What it is its acceleration?

18. Peter Caughey’s jet boat has a mass of 800kg
Peter Caughey’s jet boat has a mass of 800kg. The jet unit pushes it with a force of 12000N. What is the rate of acceleration?
A 90kg reverse bungy jumper accelerates at 50 m/s2. What is the force from the bungy cords?
An kg Hornet fighter plane is accelerated by a steam catapult at 20 m/s2. What is the force provided by the steam catapult?