Rocket Launch

Learning Objectives

By the end of this activity, students will be able to:

• Explain how force and motion work together.

• Demonstrate Newton’s Third Law through a hands-on model.

• Design and test a simple propulsion system.

• Make observations and evaluate the effectiveness of their rocket designs.

Materials (per group or child)

• 1 balloon (red, white, or blue)

• 1 straw

• 6–10 feet of string or fishing line

• 2 chairs or similar supports

• Tape

• Scissors

• Optional: stopwatch, ruler, data recording sheet

Procedure

1. Set Up the String Track:

   • Thread the string through the straw.

   • Tie the ends of the string tightly between two chairs so it’s straight and taut.

2. Prepare the Balloon:

   • Inflate the balloon but do not tie it off. Pinch the neck to hold the air in.

   • Tape the balloon horizontally to the straw.

3. Launch the Rocket:

   • Let go of the balloon and observe it propel along the string.

4. Repeat with Variations:

   • Try different sizes of balloons.

   • Change the angle of the string.

   • Add “fins” or decorations to affect aerodynamics.

Vocabulary to Introduce

• Force

• Thrust

• Motion

• Resistance

• Newton’s Third Law