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# Projectile Motion

Projectile Motion. Projectile Motion. Feeding the Monkey (Banana Gun). Where does the zookeeper aim if he wants to hit the monkey? ( He knows the monkey will let go as soon as he shoots ! ). Feeding the Monkey. r = r 0. If there were no gravity, simply aim . at the monkey. r = v 0 t.

## Projectile Motion

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### Presentation Transcript

1. Projectile Motion Projectile Motion

2. Feeding the Monkey(Banana Gun) • Where does the zookeeper aim if he wants to hit the monkey? • ( He knows the monkey willlet go as soon as he shoots ! )

3. Feeding the Monkey... r = r0 • If there were no gravity, simply aim at the monkey r =v0t

4. Banana hits monkey! Feeding the Monkey... r= r0 - 1/2 g t2 • With gravity, still aim at the monkey! r= v0t - 1/2 g t2

5. Horizontally Launched Projectile

6. Projectile Motion

7. Projectile Velocities

8. Net Force in Freefall

9. Independence of x & y Motions For Vx= 5 m/s

10. Projectile Launched at Angle

11. Projectile Launched at Angle - 2

12. Monkey Zookeeper

13. Monkey – Zookeeper – No Gravity

14. Monkey Zookeeper - Fast

15. Monkey – Zookeeper - Slow

16. Projectile Trajectories Complementary angles have equal ranges

17. Satellite Motion • If superman threw a rock fast enough … it would orbit the earth (if there were no air resistance

18. Satellite = Fast Projectile • Since the earth’s surface curves away from the horizontal by 5 m for every 8000 m tangent to the surface • V = 8000 m/s = 8 km/s

19. Satellite Periods • For a satellite close to the Earth, the period (the time for a complete orbit about the Earth) is about 90 minutes. • For higher altitudes, the orbital speed is less, distance is more, and the period is longer. • For example, communication satellites located in orbit 5.5 Earth radii above the surface of the Earth have a period of 24 hours.

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