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Day 1 – Calculating Speed

Mr. LambertIntegrated Science 1ATrimester 2, 2014

+Bell Ringer

In your own words, explain the meaning of 100 mi/h and 45 m/s

Does running twice as far take twice as much time?

Make a pile in your group with your finished Scientific Method Scenarios Homework

+Agenda

1. Bell Ringer

2. Learning Targets

3. Average speed

4. Lab activity

5. Practice problems

6. Exit Slip

+Learning Targets

On your Bell Ringer Sheet, write the following:

We will use measurements of distance and time to calculate average speed.

+What is speed?

What does 60 mph mean?

If I travel 50 miles in 1 hour, what is my speed?

What about 100 miles in 2 hours?

+What is the relationship between distance, time, and speed?Average Speed =

OR

Distance = Average Speed x Time

OR

Time =

+Video

https://www.youtube.com/watch?v=_nAKwhZyXnw

+Units

Meters per second (m/s)

Miles per hour (mi/h or mph)

Kilometers per hour (km/h)

+Lab activity

Copy the following table

Ramp height (cm)

Distance (m)

Time (s) Speed (m/s)

5 1

10 1

15 1

+Lab activity Model

Measure out 1m after end of ramp

1m

1m

1m

+Lab Activity Wrap-up

Compare the ramp height and speed. What pattern do you observe?

What is the independent & dependent variable?

+Whiteboards

+Calculating average speed

NASCAR fans love race day when they get a chance to cheer on their favorite team! If a driver was able to travel 600 miles in 3 hours, what was his average speed?

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The fastest car on Earth, a British-made Thrust SSC, would win every NASCAR race in America. If it takes 0.5 hours (30 minutes) to travel 380 miles, what is its speed?

+Calculating average speed

The fastest train on Earth, the TGV from France, can travel at faster speeds than trains in the United States. During a speed test, the train traveled 800 miles in 2.5 hours. What is its speed?

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Spirit of Australia, a hydroplane boat, made speed records by traveling 239 miles in 0.75 hours (45 minutes). What is its record-breaking speed?

+Calculating distance & time

Calculate the distance that you would travel if you drove for:a) 3 hours at 20 mphb) 8 hours at 60 mphc) 2 hours at 80 mphd) 3 hours at 90 mph

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How long does it take to travel:a) 120 miles at 40 mph b)300 miles at 50 mphc) 240 miles at 60 mph d)280 miles at 70 mph

+Learning Targets

How did we do?

I can use measurements of distance and time to calculate average speed.

+Exit Slip

A car travels 300 miles in 5 hours. Calculate the average speed of the car.

How long does it take for the car to travel 82 miles?