Newton's Third Law

Newton's third law

Action and reaction.

According to Newton's third law...

For every action there is an equal and opposite re-action.

What does this mean?

This means that for every force there is a reaction force that is equal in size, but opposite in direction. That is to say that whenever an object pushes another object it gets pushed back in the opposite direction equally hard.

Let's study how a rocket works to understand

Newton's Third Law.

The rocket's action is to push down on the ground with the force of its powerful engines, and the reaction is that the ground pushes the rocket upwards with an equal force.

The material we use.

- balloon

- string

- straw

- tape

What were the difficulties?

We did not experience any difficulty in developing this experiment because a balloon provides a simple example of how works the air trapped inside the globe, this pushes out the open end, causing the balloon to move forward. The force of the air escaping is the "action"; the movement of the balloon forward is the "reaction" predicted by Newton's Third Law of Motion.

What did we observe?

We observe that the walls of the balloon push the air out as it opens. Likewise, when the balloon pushes against the air, the air pushes back. As a result the balloon travels along the string that it is attached to.

What made it work?

Newton’s third law states that there is an opposite reaction to every action.

When one blows into the balloon, there is elastic potential energy. As long as the mouth of the balloon is closed, the elastic potential energy is stored. When the balloon is released, the air is let out, but it also pushes the balloon forward. At this instant, the potential energy transforms into kinetic energy. Some kinetic energy is transferred to sound energy (balloon makes noise) and thermal energy (friction between straw, balloon, string).

Importance

Is very important to know Newton's third law of motion that for every action there is a reaction. This law states that every action has an equal and opposite reaction, which saw in the example of the globe, showing very similar

Conclusion

This experiment had enabled to examine the overall work done and the power of a balloon with air

As the balloon moves forward and slowly runs out of air, the applied force runs out as the air runs out. However, due to inertia, the balloon will continue to move forward – there is still the air resistance force and the friction force.

If we consider the motion of the balloon, we can understand why it works. As the air is released from the bottom of the balloon,

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