Download presentation

Presentation is loading. Please wait.

Published byUlysses Lyles Modified about 1 year ago

2
Projectile Motion

3
Feeding the Monkey (Banana Gun) l Where does the zookeeper aim if he wants to hit the monkey? ( He knows the monkey will let go as soon as he shoots ! )

4
Feeding the Monkey... l If there were no gravity, simply aim at the monkey r = r 0 r =v 0 t

5
Feeding the Monkey... rvg r = v 0 t - 1 / 2 g t 2 l With gravity, still aim at the monkey! rg r = r 0 - 1 / 2 g t 2 Banana hits monkey!

6
Projectile: An Object Moving Solely Under Influence of Gravity

7
Horizontally Launched Projectile

8
Projectile Motion

9
Projectile Velocities

10
Net Force in Freefall Horizontal Motion Vertical Motion Net Force NO YES – force of gravity – downward Acceleration NO YES – “g” is downward at about 10 m/s/s Velocity Constant Changing by about 10 m/s each second

11
Independence of x & y Motions t (s)V y (m/s)Y (m) 000 1105 220 33045 44080 t10 t5t 2 X (m) 0 5 10 15 20 vxtvxt For V x = 5 m/s

12
Projectile Launched at Angle

13
Projectile Launched at Angle - 2

14
Monkey Zookeeper

15
Monkey – Zookeeper – No Gravity

16
Monkey Zookeeper - Fast

17
Monkey – Zookeeper - Slow

18
Projectile Trajectories Complementary angles have equal ranges

19
Satellite Motion l If superman threw a rock fast enough … it would orbit the earth (if there were no air resistance

20
Satellite = Fast Projectile l Since the earth’s surface curves away from the horizontal by 5 m for every 8000 m tangent to the surface l V = 8000 m/s = 8 km/s

21
Satellite Periods l For a satellite close to the Earth, the period (the time for a complete orbit about the Earth) is about 90 minutes. l For higher altitudes, the orbital speed is less, distance is more, and the period is longer. l For example, communication satellites located in orbit 5.5 Earth radii above the surface of the Earth have a period of 24 hours.

Similar presentations

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google