newtons third law of motion working model science project for exhibition - howtofunda - physics

Introduction

In this tutorial, you will learn how to create a simple working model that demonstrates Newton’s Third Law of Motion, which states that for every action, there is an equal and opposite reaction. Using easily available materials, we will construct a fun model, such as a balloon rocket or a syringe-powered rocket, to illustrate this fundamental principle of physics. This project is perfect for science exhibitions and helps visualize how motion works in real life.

Step 1: Gather Your Materials

To build the working model, you will need the following materials:

• Color Papers
• Threads
• Glue Gun
• Glue Sticks
• Scissors
• Cutter
• Fevicol (white glue)
• Paint and Paint Brushes
• Robo DC Motor (optional)
• DC Motor (optional)
• DC Water Pump (optional)
• Switch (optional)

You can find many of these items online or at a local craft store.

Step 2: Understand Newton’s Third Law of Motion

Before starting the project, familiarize yourself with the concept of Newton’s Third Law of Motion. This law explains that forces work in pairs; when one object exerts a force on another, the second object exerts an equal force in the opposite direction. Real-world examples include:

• Rockets propelling forward as exhaust gas is expelled backward.
• Jumping off the ground pushes you up while your feet push down on the ground.

Step 3: Choose Your Rocket Model

Decide whether you want to create a balloon rocket or a syringe-powered rocket. Both demonstrate Newton’s Third Law effectively.

Balloon Rocket

• Inflate a balloon and release it without tying it. Observe how it propels in the opposite direction of the air escaping.

Syringe Rocket

• Use a syringe filled with water. When you push the plunger, water is expelled, causing the syringe to move in the opposite direction.

Step 4: Construct the Rocket Model

For the Balloon Rocket

1. Cut a piece of thread to the desired length.
2. Securely attach one end of the thread to a wall or a stable surface.
3. Inflate the balloon without tying it, and tape it to a straw.
4. Thread the other end of the string through the straw and pull it tight.
5. Release the balloon and watch it fly along the thread.

For the Syringe Rocket

1. Fill the syringe with a small amount of water.
2. Secure the syringe to a base using glue or tape, ensuring the opening is clear.
3. Push the plunger down quickly and observe the movement in the opposite direction.

Step 5: Experiment and Observe

• Test your model several times, varying the amount of air in the balloon or the amount of water in the syringe.
• Record your observations on how the distance traveled changes with different amounts of force applied.

Conclusion

Congratulations! You have successfully created a working model that demonstrates Newton’s Third Law of Motion. This project not only helps you understand a key physics concept but also engages you in hands-on learning. For further exploration, consider experimenting with different designs or materials for your rocket. Share your project at a science exhibition or with friends to showcase your understanding of physics in action!