# Rockets; Video Analysis

### Questions

1. What is the influence of reaction mass (water in the two-liter bottle) on the height a two-liter bottle will travel at a constant pressure?
2. What is the influence of reaction mass (water in the two-liter bottle) on the maximum velocity a two-liter bottle will travel at a constant pressure?

Materials

Rocket launcher

### Procedures

Build a rocket as per the instrucitons in the Sourebook for Teaching Science.

See Kelly Castillo's students' rockets. (alternate page)

Enrichment - Explore with Rocket Simulator

### Rocket Launch & Projectile motion Analyzed with VideoPhysics App

• Video Physics (video analysis)
• Inclinometer
• Motion-X GPS
• Wind Speed (annemometer)
• AccelMeter (accelerometer)
• Record Data
• Position the rocket launcher so that it is pointed vertically. Check using your inclinometer app in your mobile phone
• Record the windseed using your mobile wind spee App
• Record your precise GPS location using the GPS App
• Using your accelerometer App in your mobile device, determine the maximum acceleration obtained by jerking your device quickly. Record in the table. By doing a video analysis of the rocket you can determine its acceleration and compare with your tests on your mobiel device.
• Video the trajectory of the rocket.
• Plot the position of the rocket at each frame
• Plot position vs. time and velocity vs. time using Video Physics
• Upload Graph of rocket launch generated by analyzing the flight in Video Physics to our shared dropbox folder.
• Video the trajectory of a tennis ball tossed straight in the air
• Plot the position of the rocket at each frame
• Plot position vs. time and velocity vs. time using Video Physics
• Upload Graph of rocket launch generated by analyzing the flight in Video Physics to our shared dropbox folder.

### Discussion

Enter the following answers in the electronic quickwrite.