Speed and Velocity
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Transcript of Speed and Velocity
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Speed and Velocity
James Martin Middle School Mrs. Anna Ward
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DO NOW!!!! In the formula: S = D/T, what does the:
S stand for? D stand for? T stand for?
Calculate the answers using the formula S = D/T:1. A bicyclist travels 60.0 kilometers in 3.5 hours. What is
the cyclist’s average speed?
2. How much time would it take for the sound of thunder to travel 1,500 meters if sound travels at a speed of 330 m/sec?
3. A comet is cruising through the solar system at a speed of 50,000 kilometers per hour for 4 hours time.
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Announcements
The Quiz scheduled for tomorrow has been moved to Friday
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Agenda Average Speed vs. Instantaneous Speed
Speed vs. Velocity
Choral Response: Speed and Velocity
Speed practice problems
Racecar lab on Speed
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Average Speed Instantaneous Speed
Average Speed is the total distance divided by the total time, the average of all the speeds during a given time
Think about it….if you drive to school from your house, do you travel at the same time for the entire trip?
However, in science class we will use the average speed for our calculations
Your moment-to-moment speed
The speed at any given moment
What the “SPEED LIMIT” is based off of
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What is velocity?Velocity is speed with direction
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Speed versus Velocity
http://www.youtube.com/watch?v=DRb5PSxJerM
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Speed vs. Velocity—Choral Response
Speed is distance over
time; Velocity adds in
direction
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CFUs:1. What is speed + direction?2. Ms. Lusk’s room is 20 meters from my room.
Duante went to take a textbook to her room and it took 20 seconds to get there. What was his speed?
3. The baseball field is 300 meters away. Alfie is really late to practice, so it only took 60 seconds to get to to the field. What was his speed?
4. What is the formula for speed?5. What is the formula for velocity?6. Ramiro took his dog for a walk around the block.
It took him 5 minutes to travel 1 km.
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More CFUs:6. Kaleeha walks at a rate of 1.5 m/s. She needs to
go from Mrs. Ward’s room to the office to pick up a form. It takes her 240 seconds to get to the office and back. How far did she walk?
7. How far is the office from Mrs. Ward’s room?8. Dianelys runs during soccer practice for every
day after school. She runs the length of the field many times at every practice. If Ms. Bickett times Dianelys running at a rate of 2.5 m/s for 400 meters, how long does she run?
9. What is the name for the location of a place or thing?
10. What is another name for change in position?
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Race Car Lab We are using the same tape marks as Monday
(2 m)
Students with stopwatches will be team captains
Please use your quiet partner voices and remember to exceed expectations
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EXIT TICKET Mr. Rudolph lives 16 km from James Martin
Middle School. If he drives at an average speed of 2 km/minute, how long will it take him to get home?
Mrs. CVT has a meeting at the CMS Central Secondary Office. If it takes her 20 minutes to get there and she drives at an average rate of 1 km/minute, how far is the office?