Introduction

Physics is a discipline that seeks to understand the natural phenomena that surround us. Among these phenomena, forces play a central role, being fundamental to understanding how interactions between bodies occur.

A force can be defined as an interaction between two bodies that results in a change in the state of motion or rest of those bodies. Each force has an application point, a direction, a meaning and a magnitude, and is represented by a vector in the graphic representation.

When an object is at rest or moving at a constant speed in a straight line, we can say that the object is in equilibrium, or that the forces acting on it are balanced. This understanding is fundamental to comprehending the motion and statics of bodies.

Relevance of the Subject

In the real world, force marking is used in many applications. Engineers have to consider the forces acting on a bridge or a building to guarantee their stability. Airplane pilots must have a clear understanding of the forces acting on the aircraft to fly safely. Even in sports such as football or basketball, the notion of forces is fundamental to understand the trajectory of a ball when kicked or thrown.

The importance of this topic can be seen in many aspects of our daily life, from driving a car to designing complex engineering structures or playing your favorite sport. Therefore, mastering these concepts will not only allow you to better understand the world around you, but will also pave the way for future studies and careers in physics and engineering.

Practical exercise: “The Force is Strong in You”

Aim of the Project

This exercise aims at providing a practical demonstration of the concepts of forces in action, allowing students to understand how to mark the forces acting on a body and interpret their directions and meanings. In addition, the project aims at encouraging socioemotional skills such as teamwork, communication, problem solving and time management.

Project description

Each group of 3 to 5 students will have to design and build an “Obstacle course for the Forces”. This course will consist of a sequence of three sections, each one designed to demonstrate a specific force: gravitational force, friction force, and normal force.

Students should use everyday objects such as shoe boxes, soda bottles, etc., to build this course. The goal is that a toy car or a small ball can run through the track demonstrating the forces in action. Each group must also prepare a presentation explaining the design of its track, how it demonstrates each force, and how it applies to the concepts learned in the classroom.

Materials required

• Toy car or small ball
• Building materials (shoe boxes, bottles, tubes, etc.)
• Paper and pens for notes and drawings
• Internet/computer for research

Step by Step

1. Research and Planning (2 hours): Each group should research the three selected forces and plan the obstacle course, ensuring that each section correctly demonstrates one of the forces.

2. Building the Course (3-4 hours): The groups should build the obstacle course as planned. Remember to test the course several times to make sure it works as expected.

3. Preparing the presentation (2-3 hours): Each group should prepare a presentation explaining the design of its course, how it demonstrates each force, and how this applies to the concepts learned in class.

4. Presentation (variable time): Each group will present to the class, demonstrating the course and explaining its design.

Project Deliverables

At the end of the project, each group must present:

• Written Report: It should include the following main topics: Introduction (contextualization of the theme, relevance and real-world application, and objective of the project); Development (explanation of the theory, activity, methodology, and results); Conclusions (review of the main points, lessons learned, and conclusions about the project); and bibliography.

• Obstacle Course: The obstacle course must be presented and must function correctly.

• Presentation: Each group should be able to explain the design of their course, how it demonstrates each force, and how this applies to the concepts learned in class.

In conclusion, each group must prepare a written report following the proposed structure and also demonstrate the track and discuss its functionality in a presentation.