2-D Kinematics
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2-D Kinematics
description
2-D Kinematics. Drop-Shoot predictions. Clicker questions about the drop-shoot demonstration Do this AFTER talking about components, and why we split things into X & Y Independence of X & Y vectors. What do you prefer?. HW C due Thur, lab due Wed HW C due Wed, lab due Thurs No prefer. - PowerPoint PPT Presentation
Transcript of 2-D Kinematics
2-D Kinematics
Drop-Shoot predictions
• Clicker questions about the drop-shoot demonstration
• Do this AFTER talking about components, and why we split things into X & Y
• Independence of X & Y vectors
What do you prefer?
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1. HW C due Thur, lab due Wed
2. HW C due Wed, lab due Thurs
3. No prefer
One ball is dropped. The other is shot horizontally simultaneously. Which hits the ground first?
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0 1. Dropped ball
2. Horizontally shot ball
3. Both at the same time
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One ball is dropped. The other is shot horizontally simultaneously. Which has larger vertical-
component to its velocity at the end when they hit?
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0 1. Dropped ball
2. Horizontally shot ball
3. Both are the same time
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Projectile firing across flat ground
• Several clicker questions to be done BEFORE the projectile launcher demo
• Do these AFTER drop-shoot demo and 1-2 numerical questions (3.24 & handout #1)
Which object has a faster horizontal component to velocity? All have the same
TOTAL speed.
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0 1. Object launched at 30 degrees
2. Object launched at 45 degrees
3. Object launched at 60 degrees
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Which object spends more time in the air when flying over FLAT ground? All have the
same TOTAL speed.
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0 1. Object launched at 30 degrees
2. Object launched at 45 degrees
3. Object launched at 60 degrees
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When firing a projectile across FLAT ground, the projectile will go furthest if launched at an angle:
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0 1. 0-30 degrees
2. 30-60 degrees
3. 60-90 degrees
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Launch projectile over FLAT ground
• 15 degrees
• 30 degrees
• 40 degrees
• 45 degrees
Show the next few Clicker questions before 50, 60, 75 degrees.
Which goes further?
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0 1. Object launched at 30 degrees
2. Object launched at 60 degrees
3. Both go the same distance
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Firing projectiles across NOT-FLAT ground
• Clicker questions upcoming
When firing a projectile down a hill, the projectile will go furthest if launched at an angle:
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0 1. Greater than 45 degrees
2. Equal to 45 degrees
3. Less than 45 degrees
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When firing a projectile up a hill, the projectile will go furthest if launched at an angle:
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0 1. Greater than 45 degrees
2. Equal to 45 degrees
3. Less than 45 degrees
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Hunter-Monkey demo
• Clicker question predictions
Where will the bullet go?
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0 1. Above the monkey
2. Below the monkey
3. Hit the monkey
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Bullet fired much faster. What will it do?
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0 1. Above monkey
2. Below monkey
3. Hit the monkey
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Bullet fired much slower. What will it do?
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0 1. Above monkey
2. Below monkey
3. Hit the monkey
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