What Is the Applied Force?
Are you looking for an easy way to teach your child about applied force? We’ve put together a set of free materials that parents and teachers can use right away. In this lesson, your child will dive into the fascinating world of physical interactions.
We’ll explore how pressing on an object creates a concentrated force called pressure. Explore science in a more engaging way with captivating 3D videos and interactive quizzes. Download our app to get started!
Table of Contents
What You Will Learn From This Lesson
- Applied forces occur when objects push or pull.
- Pressure depends on surface area and force strength.
What is the applied force?
In the study of physics, an applied force occurs whenever we interact with an object by pressing on it. While forces are invisible to the human eye, they are constantly at work in our daily lives. Whenever an object is pushed or pulled, a force is being applied that can change the motion or the shape of that object.
Measuring the impact of this interaction involves looking at how the force is concentrated. A pressing force is a primary example of how we apply energy to change our surroundings.
By understanding these basic interactions, students can begin to see the invisible physics phenomena happening all around them.
How does applied force create pressure?
The result of an applied force is often measured as pressure, which represents how concentrated the force is on a specific area.
When we apply a force by pressing on a surface, the resulting pressure depends on both the strength of the force and the size of the surface area involved. For example, a heavier object applies a greater force onto the ground, which results in deeper footprints.
Practical applications of these principles are found in many everyday tools and objects. By manipulating the surface area or the amount of force applied, we can control the intensity of the pressure.
This allows us to perform tasks more efficiently, whether we are trying to prevent a heavy vehicle from sinking using caterpillar tracks or making a backpack easier to carry with wide straps.
Fun Fact
- Heavier objects create deeper footprints because they apply a much greater force.
- Wide backpack straps feel better because they spread force over a larger area.
- Caterpillar tracks on big machines stop them from sinking into soft ground.
- A Hand-held dynamometer is a special tool that works like a “strength scale” for your fingers and palms.
- The metal handle uses “elastic force” to snap back to its starting position the moment you let go.
- A strong grip is a great sign that your hand muscles are healthy, fast, and working perfectly together.
Vocabulary
- Applied Force: A physical interaction that occurs whenever an object is pushed, pulled, or pressed, which has the potential to change the motion or the shape of that object.
- Pressure: A measurement of how concentrated a force is on a specific area; it is determined by both the strength of the force and the size of the surface area involved.
- Surface Area: The total size of the contact surface where a force is applied; manipulating this area can control the intensity of the resulting pressure.
- Elastic Force: A restorative force found in tools like a dynamometer that allows a material, such as a metal handle, to snap back to its starting position once it is released.
- Caterpillar Tracks: Wide physical structures used on heavy vehicles to spread force over a larger area, preventing the machines from sinking into soft ground.
- Hand-held Dynamometer: A specialized scientific tool used as a “strength scale” to measure the force applied by fingers and palms.