Lesson Plan Teknis | Hydrostatics: Pressure

Objective

Duration: (10 - 15 minutes)

This part of the lesson plan aims to ensure that students grasp the basic concepts of pressure, its significance, and how it applies practically. This understanding is key for developing relevant skills, allowing students to apply their theoretical knowledge in hands-on activities and in their future careers. The connection to the job market is underscored by the importance of pressure in various sectors, including engineering, medicine, and meteorology.

Objective Utama:

1. Understand that pressure results from a force acting perpendicular to a surface, divided by that surface's area.

2. Calculate the pressure exerted on a body or surface.

3. Comprehend what atmospheric pressure is.

Objective Sampingan:

1. Develop the ability to apply theoretical concepts to real-world scenarios.
2. Enhance understanding of everyday occurrences and their link to pressure.

Introduction

Duration: (10 - 15 minutes)

The aim of this segment is to contextualize and ignite students' interest in the subject of pressure, demonstrating its significance and real-world applications. This lays the foundation for deeper, hands-on learning that connects theory with practical experiences.

Curiosities and Market Connection

🔍 Did You Know? Atmospheric pressure keeps airplane and car tires inflated! Divers also need to be mindful of pressure to prevent issues like decompression sickness. 💼 Market Connection: Understanding pressure is crucial in multiple professions. Engineers leverage this knowledge when designing structures like dams and aircraft, while doctors monitor patients' blood pressure for health assessments. Meteorologists track atmospheric pressure to predict weather patterns and identify storms.

Contextualization

Pressure is a core concept in physics that appears in many situations we face daily, like inflating a bike tire or feeling the change in pressure when diving into a pool. Recognizing how pressure operates allows us to understand these events better and apply this knowledge to different practical domains.

Initial Activity

📽️ Initial Activity: Play a brief video (3-4 minutes) showcasing various scenarios where pressure plays a vital role, such as submarine operation, airplane flight, and weather balloon launches. Afterward, pose this thought-provoking question: 'How do shifts in pressure impact people’s lives across different careers?'

Development

Duration: (45 - 50 minutes)

This section’s goal is to deepen students' comprehension of pressure, offering a hands-on experience that illustrates how atmospheric pressure is measurable and variable. Additionally, reflective and consolidation exercises will reinforce the knowledge gained, preparing students to apply these concepts to real-world situations.

Topics

1. Definition of pressure

2. Pressure calculation (Formula P = F/A)

3. Understanding atmospheric pressure

4. Real-world applications of pressure

Thoughts on the Subject

Encourage students to contemplate how pressure affects their daily experiences and the careers they’re considering. Initiate a group discussion on how pressure can be pivotal in various contexts, such as construction, aviation, and healthcare. Facilitate dialogue on how grasping pressure can benefit their future job prospects.

Mini Challenge

Build Your Own Barometer

Students will create a simple homemade barometer to grasp the measurement of atmospheric pressure. This interactive activity allows them to visually track changes in atmospheric pressure and comprehend how it can be quantified.

1. Divide students into groups of 3-4.

2. Supply materials: a glass jar, a balloon, a rubber band, a straw, a ruler, and hot glue.

3. Guide students to cut the balloon and stretch it over the jar’s opening, securing it with the rubber band.

4. Instruct students to glue a piece of the straw to the center of the stretched balloon, with one end extending over the ruler marked with measurements.

5. Help students understand that as atmospheric pressure varies, the balloon will either expand or contract, moving the straw. They should document these variations throughout the day.

6. Encourage group discussions about how these pressure changes can be interpreted and their potential real-life implications.

Enable students to grasp how atmospheric pressure can be measured practically and how it fluctuates over time.

**Duration: (25 - 30 minutes)

Evaluation Exercises

1. Calculate the pressure from a 10 N force acting on an area of 2 m².

2. Discuss how atmospheric pressure influences weather conditions.

3. Explain why it’s essential for divers to understand pressure changes when descending to significant depths.

Conclusion

Duration: (10 - 15 minutes)

The aim of this session is to consolidate the knowledge students have gained, providing a cohesive view of how the theory of pressure is relevant to practice and various professions. This reflection and discussion moment will underscore the importance of the learning experience and its connection to reality.

Discussion

💬 Discussion: Facilitate a conversation with students regarding pressure, prompting reflections on what they’ve learned throughout the lesson. Ask how constructing the homemade barometer contributed to their understanding of atmospheric pressure and its variations. Encourage sharing of experiences from the mini-challenges and fixation exercises, as well as discussions about the practical uses of pressure in diverse careers and everyday life.

Summary

📚 Summary: Recap key topics discussed in the lesson: definition of pressure, formula for calculating pressure (P = F/A), understanding atmospheric pressure, and its practical uses. Stress the significance of pressure in daily life and across various professional fields such as engineering, healthcare, and meteorology.

Closing

🔍 Closing: Summarize how this lesson integrated theory, practice, and application through initial context, hands-on activities like building the barometer, reflection, and consolidation exercises. Emphasize the importance of understanding pressure for daily life and career paths, encouraging students to continue their exploration of the topic.