Week 12 - Typepad · Week 12 1. Draw a quick graph showing time vs. distance of a person walking 1...

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Week 12.notebook 1 October 28, 2010 Nov 410:28 AM Week 12 Mar 197:45 AM Monday Warm Up Week 12 Describe three things that are in motion in our classroom at this time. Mar 197:45 AM Pretest No talking during pretest. Log in with lunch number. Answer all questions. Mar 197:45 AM Video: Take notes Basics of Physics: Exploring the Laws of Motion Complete worksheet as you watch and after the video is over. Mar 197:45 AM Wednesday Warm Up Week 12 Why do you need to wear a seat belt in a moving car? Which of Newton's Laws applies to this? Mar 197:45 AM Cornell Notes: Motion Motion: An object's change in position relative to a reference point.

Transcript of Week 12 - Typepad · Week 12 1. Draw a quick graph showing time vs. distance of a person walking 1...

Page 1: Week 12 - Typepad · Week 12 1. Draw a quick graph showing time vs. distance of a person walking 1 m/s for 5 seconds. 2. Draw a quick graph showing time vs. speed for the same person

Week 12.notebook

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October 28, 2010

Nov 4­10:28 AM

Week 12

Mar 19­7:45 AM

Monday Warm UpWeek 12

Describe three things that are in motion in our classroom at this time.

Mar 19­7:45 AM

Pre­test

No talking during pre­test.Log in with lunch number.Answer all questions.

Mar 19­7:45 AM

Video: Take notes

Basics of Physics: Exploring the Laws of Motion

Complete worksheet as you watch and after the video is over.

Mar 19­7:45 AM

Wednesday Warm UpWeek 12

Why do you need to wear a seat belt in a moving car? Which of Newton's Laws applies to this?

Mar 19­7:45 AM

Cornell Notes: Motion

Motion: An object's change in position relative to a reference point.

Page 2: Week 12 - Typepad · Week 12 1. Draw a quick graph showing time vs. distance of a person walking 1 m/s for 5 seconds. 2. Draw a quick graph showing time vs. speed for the same person

Week 12.notebook

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October 28, 2010

Mar 19­7:45 AM

Reference Points

Each person who catches the ball will state his or her position in relation to compass points (N, S, E, W)

Doors are south, back is east, front is west, wall of cabinets is north.

Mar 19­7:45 AM

More Reference Points

This time you will state your position in relation to the person who threw it. For example, the ball traveled south west (from front to table 1)

Mar 19­7:45 AM

What is speed?

Speed: the distance traveled divided by the time interval during which the motion occurred.

meters per second = m/s

Mar 19­7:45 AM

What is average speed?

Average speed = total distance ÷ total time

Mar 19­7:45 AM

Concept Check

What is your average speed if you take 0.5 hours to jog 4000 meters?

Mar 19­7:45 AM

Concept Check #2

If the average speed of a car is 110 km/h, how long will it take the car to travel 715 km?

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October 28, 2010

Mar 19­7:45 AM

What is velocity?

Velocity is the speed of an object in a particular direction. 

20 m/s north is a velocity 20 m/s is a speed.

Mar 19­7:45 AM

How do you change velocity?

1. Change speed2. Change direction

Mar 19­7:45 AM

Can velocities be combined?

If you are on a bus moving 15 m/s east and you walk toward back at 1 m/s west, the resultant velocity is 14 m/s east.

Velocity in opposite direction subtract, Velocity in same direction, add.

Mar 19­7:45 AM

What is acceleration?

Acceleration is the rate at which velocity changes over time. 

Acceleration could be change in speed OR direction.

Mar 19­7:45 AM

Is it acceleration?

You are riding your bike at 9 km/h. Ten minutes later, your speed is 6 km/h.

Mar 19­7:45 AM

Is it acceleration?

You ride your bike around the block at a constant speed of 11 km/h.

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October 28, 2010

Mar 19­7:45 AM

Is it acceleration?

You ride your bike in a straight line at a constant speed of 10 km/h.

Mar 19­7:45 AM

What if I slow down?

That is negative acceleration. Some people call it deceleration.

Mar 19­7:45 AM

How do I find average acceleration?

average acceleration = final velocity ­ starting velocity     time it takes to change velocity

Oct 28­9:49 AM

Oct 28­10:18 AM Mar 19­7:45 AM

Assignment

Do page 123 #1­11

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Week 12.notebook

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October 28, 2010

Mar 19­7:45 AM

Thursday Warm UpWeek 12

Kira jogs to a store 72 m away in a time of 36 s. What is Kira's average speed?

Mar 19­7:45 AM

www. explorelearning.com

Time Distance gizmoComplete worksheet then take assessment.

Mar 19­7:45 AM

Friday Warm UpWeek 12

1. Draw a quick graph showing time vs. distance of a person walking 1 m/s for 5 seconds.

2. Draw a quick graph showing time vs. speed for the same person walking 1 m/s for 5 seconds.

Mar 19­7:45 AM

Title: Acceleration Lab

Question: What effect does an increase in masshave on the force needed to move an object?

Hypothesis: 

Oct 28­10:32 AM

Mass 1st timeNewtons

2nd time Newtons

3rd time Newtons

4th timeNewtons 

5th timeNewtons

Avg. Newtons 

Mass  1st max  2nd max  3rd max  4th max  5th max  Avg. Max N 

0

1

2

3

Mar 19­7:45 AM

Procedure:1. Find the mass of the cart2. Find the mass of the cart with 1, 2, and 3 fishing weights.3. Pull cart using spring scale at constant speed. 4. Record Newtons5. Repeat 5 times and find average.6. Add fishing weight and repeat #3­5 until you have average Newtons for 0, 1, 2, and 3 weights.

Page 6: Week 12 - Typepad · Week 12 1. Draw a quick graph showing time vs. distance of a person walking 1 m/s for 5 seconds. 2. Draw a quick graph showing time vs. speed for the same person

Week 12.notebook

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October 28, 2010

Mar 19­7:45 AM

Analysis:

1. Was your hypothesis correct?2. Describe the relationship between the mass ofan object and the force (Newtons) it takes to move the object.3. Are there any points on your graph that do not appear to be in line with the other points? Explain what could have gone wrong.

Oct 28­11:16 AM