welcome back to physics. your 5 minutes starts now
TRANSCRIPT
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Welcome Back to Physics
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Your 5 minutes starts now
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Objective: I can draw a position vs time graph, anduse it to find an object’s velocity.Bellringer Question:
Orin starts at position = 0. He walks 20 m away from his origin, then 10 m back towards it, then stops. Sketch a position vs. time graph for Orin.
Your 5 minutes starts now!
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4 minutes left and counting…
Objective: I can draw a position vs time graph, anduse it to find an object’s velocity.Bellringer Question:
Orin starts at position = 0. He walks 20 m away from his origin, then 10 m back towards it, then stops. Sketch a position vs. time graph for Orin.
![Page 5: Welcome Back to Physics. Your 5 minutes starts now](https://reader035.vdocument.in/reader035/viewer/2022081603/5697bffd1a28abf838cc1e95/html5/thumbnails/5.jpg)
3 minutes left and counting…
Objective: I can draw a position vs time graph, anduse it to find an object’s velocity.Bellringer Question:
Orin starts at position = 0. He walks 20 m away from his origin, then 10 m back towards it, then stops. Sketch a position vs. time graph for Orin.
![Page 6: Welcome Back to Physics. Your 5 minutes starts now](https://reader035.vdocument.in/reader035/viewer/2022081603/5697bffd1a28abf838cc1e95/html5/thumbnails/6.jpg)
2 minutes left and counting…
Objective: I can draw a position vs time graph, anduse it to find an object’s velocity.
Bellringer Question:
Orin starts at position = 0. He walks 20 m away from his origin, then 10 m back towards it, then stops. Sketch a position vs. time graph for Orin.
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1 minute left and counting…
Wrap up your answer And get ready to start the lesson
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30 seconds left and counting…
Wrap up your answer And get ready to start the lesson
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10 seconds left and counting…
Wrap up your answer And get ready to start the lesson
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Time is UP!
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Agenda1. Bellringer (5 min)2. Announcements (2 min)3. Finish Graphing Classmates (10
min)4. Quiz review (18 min)5. Exit ticket (5 min)
Homework:• Study for QUIZ #1 on Friday
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Time (s)
Position (m)
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Time (s)
Position (m)
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POSITION vs. TIMEShows where an object is
At different times
Slope of the line = velocity
Finish graphing your classmates. 10 min.
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Review
SI Units:
Length:
Time:
Volume:
Mass:
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Review
SI Units:
Length: meters
Time: seconds
Volume: liters
Mass: kilograms
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Review
SI Units:
Length: meters (m)
Time: seconds (s)
Volume: liters (L)
Mass: kilograms (kg)
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Review
• A scalar has ________
• A vector has ________ and _________
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Review
• A scalar has magnitude
• A vector has magnitude and direction
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Review
• Distance?
• Displacement?
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Review
• Distance: scalar. How much ground was covered.
• Displacement: vector. How far you are from where you started.
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Example
Travon is in an elevator. He rides it up 3 floors, then down two floors, then up 1 floor. What is his displacement?
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Example
Travon is in an elevator. He rides it up 3 floors, then down two floors, then up 1 floor. What is his displacement?
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Example
Travon is in an elevator. He rides it up 3 floors, then down two floors, then up 1 floor. What is his displacement?
1
2
3
4
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Example
Travon is in an elevator. He rides it up 3 floors, then down two floors, then up 1 floor. What is his displacement?
1
2
3
4
3 floors
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Example
Travon is in an elevator. He rides it up 3 floors, then down two floors, then up 1 floor. What is his distance traveled?
1
2
3
4
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Example
Travon is in an elevator. He rides it up 3 floors, then down two floors, then up 1 floor. What is his distance traveled?
1
2
3
4
6 floors
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Velocity
€
v =d
t
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Velocity
• Ratio of displacement to time
• VECTOR
€
v =d
t
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Velocity
A submarine goes down 100 m, then up 50 m.
€
v =d
t
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Velocity
A submarine goes down 100 m, then up 50 m.
Displacement:
Distance:€
v =d
t
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Velocity
A submarine goes down 100 m, then up 50 m.
Displacement: 50 m down
Distance: 150 m€
v =d
t
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Velocity
A submarine goes down 100 m, then up 50 m. The whole process takes 50 s.
Velocity:
€
v =d
t
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Velocity
A submarine goes down 100 m, then up 50 m. The whole process takes 50 s.
Velocity: 50 m down / 50 s =
€
v =d
t
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Velocity
A submarine goes down 100 m, then up 50 m. The whole process takes 50 s.
Velocity: 50 m down / 50 s = 1 m/s down
€
v =d
t
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Velocity
SI units?
v = d/t…
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Velocity
SI units: meters per second (m/s)
v = d/t…