Do Now3

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.

1.

Study for Quiz 1-5 WednesdayOctober 29th

2.

WDY See? Think? WednesdayOctober 29th

3.

Physics to Go(page 103 #3, 4, 6, 8)

MondayNovember 3rd

Homework :DTU

RN

IT

IN

Physics to Go

Agenda

•Do Now 5

• Braking Distance 20

• Reflecting 5

• P.E.Q 12

•WDY Think Now? 8

Objectives 1-5We are learning…Braking distance is dependent on

the negative acceleration of the vehicle (brakes, road surface) and reaction time (d=v2/2a)

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

Physics TalkProblem #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 4 4 m / s 40 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.

Physics Talk

d = vi2

-2a

Physics TalkProblem #1 If a motorcycle traveling at 3 m/s with a negative acceleration of 2 m/s2, what is the braking distance traveled before the motorcycle comes to a stop?

Physics TalkProblem #2 Now suppose the speed is doubled to 6 m/s…

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

Physics TalkProblem #4 Now suppose the speed is halved to 1.5 m/s…

Physics TalkProblem #5 Now suppose the speed is quartered to 0.75 m/s…

Reflecting (page 87)

P.E.Q. (page 87)12

minutes!

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?

8minute

s!

Checking Up4

minutes!