Balloon rocket in Laws Of Motion – Class 9 Science Experiment

Chapter Name: Laws Of Motion

Activity Name: Balloon rocket in Laws Of Motion

Activity Description:

Balloon rocket in Laws Of Motion - Class 9 Science Experiment

This experiment explores Newton’s third law of motion using a balloon rocket setup. The activity involves inflating a balloon and attaching it to a straw using a thread.

When the fingers holding the balloon’s neck are released, the air escapes from the balloon, propelling it in the opposite direction.

Required Items:

  1. Balloon
  2. Straw
  3. Thread
  4. Tape

Step by Step Procedure:

  1. Inflate a balloon.
  2. Press the neck of the balloon with your fingers to prevent air from escaping.
  3. Pass a thread through a straw and tape the balloon securely to the straw.
  4. Hold one end of the thread while your friend holds the other end.
  5. Release your fingers from the balloon’s neck to allow air to escape.

Experiment Observations:

Upon releasing the balloon’s neck, the balloon will move in the direction opposite to the escaping air.


  • Ensure the balloon is securely taped to the straw to prevent it from detaching during the experiment.
  • Perform the activity in an open area to allow the balloon to move freely without any obstructions.

Lesson Learnt from Experiment:

The experiment demonstrates Newton’s third law of motion, which states that for every action, there is an equal and opposite reaction. As the air escapes from the balloon in one direction, the balloon moves in the opposite direction with an equal force.

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