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Prep At School | 15 Copies: do now 10 Tables: TWIC 2 NOAH 3 At Home | 35 xxx.

Published byPiers Cummings Modified over 8 years ago

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Presentation on theme: "Prep At School | 15 Copies: do now 10 Tables: TWIC 2 NOAH 3 At Home | 35 xxx."— Presentation transcript:

1 Prep At School | 15 Copies: do now 10 Tables: TWIC 2 NOAH 3 At Home | 35 xxx

2 Do Now 3 minutes ! 1. Draw the equipment set-up used for Investigate 1-5. Include the position of the cart after rolling down the ramp. 2. Label the point where initial speed was measured. 3. Label the braking distance.

3 1.Study for Quiz 1-5Wednesday October 29th 2.WDY See? Think?Wednesday October 29th 3.Physics to Go (page 103 #3, 4, 6, 8) Monday November 3 rd Homework :D TURN IT IN Physics to Go

4 Agenda Do Now 5 Braking Distance 20 Reflecting 5 P.E.Q 12 WDY Think Now? 8 Objectives 1-5 We are learning… Braking distance is dependent on the negative acceleration of the vehicle (brakes, road surface) and reaction time (d=v 2 /2a) We will be successful when we can… Plan and carry out an experiment to relate braking distance to initial speed Determine braking distance Examine accelerated motion

5 Physics Talk Problem #5 A skateboarder has an initial velocity of 2 m/s and can brake within 10 m. If initial velocity is… Braking distance will be… Initial velocity Braking distance x 2 x 44 m / s40 m x 3 x 4 x 1/2 x 1/3 x 1/4 Explain how this graph represents the square relationship between initial velocity and braking distance.

6 Physics Talk d = v i 2 -2a

7 Physics Talk Problem #1 If a motorcycle traveling at 3 m/s with a negative acceleration of 2 m/s 2, what is the braking distance traveled before the motorcycle comes to a stop?

8 Physics Talk Problem #2 Now suppose the speed is doubled to 6 m/s…

9 Physics Talk Problem #3 Now suppose the speed is tripled to 9 m/s…

10 Physics Talk Problem #4 Now suppose the speed is halved to 1.5 m/s…

11 Physics Talk Problem #5 Now suppose the speed is quartered to 0.75 m/s…

12 Reflecting (page 87)

13 P.E.Q. (page 87) 12 minutes !

14 WDYTN? (page 86) What factors must you consider to determine if you will be able to stop in the distance between you and the animal to avoid hitting it? 4 complete sentences Initial Speed | Breaking Distance Positive or negative acceleration? 8 minutes !

15 Checking Up 4 minutes !

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