MODUL PRAKTIKUM HUKUM ARCHIMEDES - NI'MATUT TAMIMAH, S.Si., M.Sc.

Introduction

This tutorial provides a step-by-step guide for conducting experiments based on Archimedes' principle, as discussed in the video by Ni'matut Tamimah. Understanding this principle is crucial in physics, particularly in fluid mechanics, as it explains the buoyant force acting on objects submerged in fluids. This guide will help you grasp the concept and apply it in practical laboratory settings.

Step 1: Understand Archimedes' Principle

• Archimedes' principle states that an object submerged in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced by the object.
• Key terms to know:
  • Buoyant Force: The upward force exerted by the fluid.
  • Displaced Fluid: The volume of fluid that is pushed aside by the submerged object.

Step 2: Gather Necessary Materials

To conduct your experiments, you'll need:

• A graduated cylinder or a large container filled with water.
• An object to test (e.g., a piece of metal, wood, or plastic).
• A scale for measuring the weight of the object.
• A ruler for measuring dimensions, if necessary.
• A calculator for computations.

Step 3: Measure the Weight of the Object

• Use the scale to determine the weight of the object in air.
• Record this weight as it will be used to calculate the buoyant force.

Step 4: Measure the Volume of the Displaced Water

• Carefully submerge the object in the water in the graduated cylinder or container.
• Observe the water level before and after submerging the object.
• Calculate the volume of water displaced by noting the change in water level.

Step 5: Calculate the Buoyant Force

• Use the formula to calculate the buoyant force: [ \text{Buoyant Force} = \text{Weight of Displaced Water} = \text{Volume of Displaced Water} \times \text{Density of Water} ]
• Remember that the density of water is typically 1 g/cm³ (or 1000 kg/m³).

Step 6: Compare and Analyze Results

• Compare the calculated buoyant force with the weight of the object.
• Analyze whether the object floats or sinks:
  • If the buoyant force is greater than the weight of the object, it will float.
  • If the buoyant force is less than the weight, it will sink.

Common Pitfalls to Avoid

• Ensure the object is fully submerged to accurately measure displaced water.
• Avoid air bubbles clinging to the object, as they can affect the measurement of displaced volume.
• Double-check your scale calibration to ensure accurate weight readings.

Practical Applications

• Understanding Archimedes' principle is vital in various fields such as engineering, naval architecture, and even in designing everyday objects like boats and submarines.
• This principle also finds applications in measuring the density of irregularly shaped objects.

Conclusion

This tutorial outlined the steps to conduct experiments based on Archimedes' principle, from understanding the concept to measuring and calculating buoyant forces. By following these steps, you can effectively demonstrate and apply this fundamental principle of physics in practical scenarios. Now that you have this knowledge, consider exploring more complex applications, such as varying fluid densities or shapes of submerged objects.