this graph of tangential velocity vs. angular velocity for a point on a spinning disc, indicates...
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Angular Velocity rad/s
Velocity m/s
This graph of tangential velocity vs. angular velocity for a point on a spinning disc, indicates that the point is what distance from the center of the disk?
STARTER
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Starter
By what factor does the centripetal accelerationchange if the angular velocity is doubled?
Tripled?
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Practice
Recall from the circular motion study that:
v =wr and ac = w2r
You will investigate these relationships.
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Application : Circular Motion LabPart 1: v vs. w
Open “ Ladybug Revolution in phet physics simulations, online.
Go to Rotation tab.
Choose the following options: ( Close the q graph.)
Put the ladybug 2m from the center of the wheel.
Set w at 1,2,3,………………10 rad/sec and record v for each.
Plot v vs. w and get a fit.
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Application : Circular Motion Lab Part 2 v vs. r
Open “ Ladybug Revolution in phet physics simulations, online.
Go to Rotation tab.
Choose the following options: ( Close the q graph.)
Set w at 2.00 rad/s and leave it there for all data.
Put the ladybug 1m from the center of the wheel. Start,and record v. Repeat for R = 2,3,and 4m.
Plot v vs. r and get a fit.
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Application : Circular Motion Lab Part 3 : a vs. w
Open “ Ladybug Revolution in phet physics simulations, online.
Go to Rotation tab.
Choose the following options: ( Close the q graph.)
Put the ladybug 2m from the center of the wheel.
Set w at 1,2,3,………………10 rad/sec and record a for each.
Plot a vs. w and get a fit.
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Data tablesPart 1
w v
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
Part 2
R v
1.0
2.0
3.0
4.0
Part 3 w a
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0
10.0
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Questions for the Lab
1. What is the slope of your v vs. w graph? What is the meaning of this number?
2. Is the a vs. w graph linear? What is the coefficient of the squared term? What is the meaning of this number?
3. How would your v vs. w graph have changed if you had placed the object
closer to the center of the rotating disk?
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Lab Report Checklist
3 Data Tables
V vs. r graph with a curve fit
V vs. w graph with a curve fit
a vs. w graph with a curve fit.
Questions
Summary
Put this in your science notebook.
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Exit
What do you expect the a vs. w graph to look like? Explain.