Contextualization

Physics, at its core, seeks to explain the phenomena that occur in the universe, from the tiniest particles to the expansion of the cosmos. Within this field of study, we find a part that is very interesting to us: Mechanics. In it, we study motion, the interaction between bodies, and it is here that we come across the idea of energy.

Energy can be understood as the 'currency' of physical systems. It is through it that we can, for example, lift a weight, move a car, or launch an object into the air. Within the study of energy, there is a specific type that catches our attention: elastic potential energy.

Elastic potential energy is related to the deformation of a body. When we stretch a spring or inflate a balloon, we are altering the shape of these bodies, and this deformation implies elastic potential energy. It is a key concept for understanding everyday phenomena, productive processes, and even the physics behind some toys.

Think of a trampoline. When we jump on it, our weight deforms the canvas, 'storing' elastic potential energy in it. When the canvas returns to its original shape, this energy is released, propelling us upwards again. This is a simplified example, but it provides an initial image of the practical relevance of this concept.

Furthermore, elastic potential energy is closely linked to interest in sustainability. After all, understanding how energy is stored and released is essential for the development of energy storage and recovery solutions, essential for the energy challenges of the 21st century.

To help you delve deeper into the subject, we suggest the following resources:

1. Elastic Potential Energy - Brasil Escola: provides an introduction to the concept and explores related calculations.

2. Elastic Potential Energy - UOL Educação: presents a more detailed explanation of the concept and how it fits into the study of Physics.

3. What is Elastic Potential Energy - Toda Matéria: presents simple definitions and practical examples from everyday life.

These resources provide a good starting point for discussing and understanding the key concepts necessary for the project's execution. Explore them, discuss them, and seek to understand the importance of studying elastic potential energy.

Practical Activity

Activity Title: 'Catapulting Knowledge: An Investigation on Elastic Potential Energy'

Project Objective:

Investigate and understand Elastic Potential Energy through the construction and experimentation with a homemade catapult. The project aims not only at developing practical skills in conducting experiments but also at promoting teamwork, problem-solving, and research and documentation skills.

Project Description:

Students, organized in groups of 3 to 5 people, will design and build a homemade catapult using common everyday materials. Using this catapult, the groups will conduct a series of tests to investigate the relationship between elastic potential energy and kinetic energy. Additionally, they should document the entire construction and testing process and analyze the results obtained in a final report.

Required Materials:

The following materials will be needed:

• Popsicle sticks
• Rubber bands
• Glue
• Tape
• A small rubber ball or similar
• Ruler
• Scale
• Stopwatch

Activity Steps:

1. Initial Research: Before building the catapult, students should conduct a brief research on the subject, including how catapults work, elastic potential energy, and kinetic energy. This research should be documented, including the consulted sources.

2. Planning: Next, students should plan their catapult, drawing a sketch and noting the materials they intend to use.

3. Construction: Students should build the catapult as planned. If problems arise, students should document what they were and how they were solved.

4. Testing: Once the catapult is ready, students should conduct a series of tests. They should measure the distance the projectile (rubber ball) travels, the time it takes to reach the ground, and the weight of the projectile. With this information, they can calculate the kinetic energy of the projectile and the elastic potential energy of the system.

5. Results Analysis and Report Writing: Using the collected data, students should analyze the results and discuss their findings. They should relate their results to the initial research and relevant scientific theories. This analysis should be written in a structured report that includes the following topics: Introduction, Development, Conclusions, and Bibliography.

Project Deliverables:

At the end of the project, the team must deliver:

1. Built catapult.
2. Final report, which should include the introduction with the theoretical contextualization of elastic potential energy and kinetic energy; the development, detailing the catapult construction process, encountered problems, and the methodology used in the tests and the analysis of the results; the conclusions, which should synthesize the learnings, the results of the test analysis, and the practical applications of elastic potential energy; and the bibliography used during the research.

Students should focus on the quality of the report, ensuring that all information is presented clearly and completely. Each section of the report should complement the others, creating a complete document that describes the entire project, from the initial research to the final conclusions.