![]() Using the launch safety instructions shown below, develop specific launch safety rules through group discussions. Countdowns help everybody to know when the rocket will lift off. ![]() Your final assignment will be a journal entry via email giving details on your design, the comparisons you made, and your conclusions on the reasons for the rockets' performances.ģ.You must follow the safety rules launching bottle rockets. (Follow this link to learn how to measure the altitude reached by your rockets: Model Rockets, Measured Altitude.) Then compare your prediction with the rocket's actual performance and compare the flight of your rocket with other rockets. While one team launches their rocket, another team can assist them by tracking the rocket, determining how high it flew, and recording the information on a worksheet. An example is shown below:Ģ.One bottle rocket launcher is needed for the class. You may want to customize your rockets by decorating them in some way. You will also determine the terminal velocity or the bottles flight. You will then predict how well your rocket will fly and record your prediction on the worksheet. You and your team members must decide (1) on the design you will use as a result of experimenting with the simulators and (2) on the materials you will use for the body, fins, and cone of the rocket (which is placed over the empty 2-liter soda bottle before launch). The water expels from the bottle before the air does, turning the bottle rocket into a bigger version of a water rocket toy (available in toy stores).Įxtension Activity: In order to learn more about model rockets and how they work, follow these links for information on Flight of a Bottle Rocket, Rocket Aerodynamics, and Forces on a Rocket.ġ.You will work in teams to construct two water bottle rockets with either empty 2-liter soda bottles or empty 20 ounce soda bottles, or one of each. Adding a small amount of water to the bottle increases the action force. You can increase the force further by adding a small amount of water, which increases the mass expelled by the air pressure in the rocket.ģrd Law - Finally, the action force of the air (and water) as it rushes out of the nozzle creates an equal and opposite reaction force propelling the rocket upward.Īs with a balloon, air pressurizes the bottle rocket. (Before you begin, print out a worksheet to use as you complete the activity.)ĭuring the completion of this activity, you will demonstrate science processing skills, an ability to use technological design, and an ability to identify factors that affect motion and forces.īottle rockets are excellent devices for investigating "Newton's Three Laws of Motion":ġst Law - A rocket will remain on the launch pad until an unbalanced force is exerted, propelling the rocket upward.Ģnd Law - The amount of force depends upon how much air is pumped inside the rocket. Some adaptations from the online version at NASA website
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