How does the mass of a rocket affect its acceleration and force?
This was the driving question for our 8th grade IPC (Integrated Physics and Chemistry) students as they wrapped up their Motion & Force unit. To explore this concept, students conducted an investigation centered around Newton’s Three Laws of Motion - using balloon rockets as their test subjects.
Working together, students built a simple launch station and tested two balloons of different masses. For each balloon, they conducted three trials, carefully recording the time it took for the balloon to stop and the distance it traveled. With that data in hand, they applied familiar formulas to calculate speed, acceleration, and force.
After collecting and analyzing their results, students were able to evaluate whether their findings supported their hypotheses. They also reflected on why their results turned out the way they did-making connections to Newton’s Laws. From the action-reaction pairs in the balloon’s launch to the role of mass in acceleration, students saw the laws of motion come to life in a hands-on, memorable way.
This engaging lab not only helped the students’ understanding of motion and force, but also served as an exciting and meaningful conclusion to our unit!







