2-D Kinematics

# 2-D Kinematics

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## 2-D Kinematics

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1. 2-D Kinematics

2. 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

3. What do you prefer? • HW C due Thur, lab due Wed • HW C due Wed, lab due Thurs • No prefer

4. One ball is dropped. The other is shot horizontally simultaneously. Which hits the ground first? • Dropped ball • Horizontally shot ball • Both at the same time

5. One ball is dropped. The other is shot horizontally simultaneously. Which has larger vertical-component to its velocity at the end when they hit? • Dropped ball • Horizontally shot ball • Both are the same time

6. 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)

7. Which object has a faster horizontal component to velocity? All have the same TOTAL speed. • Object launched at 30 degrees • Object launched at 45 degrees • Object launched at 60 degrees

8. Which object spends more time in the air when flying over FLAT ground? All have the same TOTAL speed. • Object launched at 30 degrees • Object launched at 45 degrees • Object launched at 60 degrees

9. When firing a projectile across FLAT ground, the projectile will go furthest if launched at an angle: • 0-30 degrees • 30-60 degrees • 60-90 degrees

10. Launch projectile over FLAT ground • 15 degrees • 30 degrees • 40 degrees • 45 degrees Show the next few Clicker questions before 50, 60, 75 degrees.

11. Which goes further? • Object launched at 30 degrees • Object launched at 60 degrees • Both go the same distance

12. Firing projectiles across NOT-FLAT ground • Clicker questions upcoming

13. When firing a projectile down a hill, the projectile will go furthest if launched at an angle: • Greater than 45 degrees • Equal to 45 degrees • Less than 45 degrees

14. When firing a projectile up a hill, the projectile will go furthest if launched at an angle: • Greater than 45 degrees • Equal to 45 degrees • Less than 45 degrees

15. Hunter-Monkey demo • Clicker question predictions

16. Where will the bullet go? • Above the monkey • Below the monkey • Hit the monkey

17. Bullet fired much faster. What will it do? • Above monkey • Below monkey • Hit the monkey

18. Bullet fired much slower. What will it do? • Above monkey • Below monkey • Hit the monkey