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PhysAug26

# PhysAug26 - – I have learned that • Next steps – Next...

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August 26 Physics

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In: If someone dropped a penny off the Empire State Building (443 m), how long would it take to fall?
Objective: To understand freefall of objects thrown into the air. Success criteria Be able to solve freefall problems with initial velocity.

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Picket fence freefall lab Problem: to measure the acceleration due to gravity to .5% precision. Background information: 5 important items Hypothesis: preliminary questions Procedure: Diagram Data: Table

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Precision vs Accuracy Uncertainty: (Max-Min)/2 Precision: uncertainty/average x 100 Accuracy: Error %= measured – actual x 100 actual

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Restate the Problem: We were trying to find out ..... Explain the procedure: We did this by ...... State the results: We found out ..... Explain the results: This is because

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Unformatted text preview: .... – I have learned that. .... • Next steps: – Next time I would like to try. .... • Up-Down: Free fall tricks • Acceleration is always -9.8 on Earth. • Velocity at the top = 0 • To avoid a quadratic calculate top to bottom instead of bottom to top • Total time = time up + time down • Time up = time down • Velocity down = -velocity up • Displacement over total trip = 0 Problem set Freefall #1 • Work in pairs, put work into Daily work in lab book • This is your last chance to understand freefall problems before the quiz. • Make sure you understand each problem. • If you finish early, help other groups, you are the new experts! Synthesis I own/I don’t understand Out: What do you need to study for the test?...
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