TUMBUKAN FISIKA

Introduction

This tutorial will guide you through the concepts of physics collisions, specifically focusing on three types: perfectly elastic collisions, partially elastic collisions, and completely inelastic collisions. Understanding these concepts is essential for students studying physics, as they apply to various real-world scenarios such as vehicle collisions, sports, and more.

Step 1: Understand Perfectly Elastic Collisions

In a perfectly elastic collision, both momentum and kinetic energy are conserved.

Key Characteristics:

• No energy is lost to sound, heat, or deformation.
• Objects bounce off each other without any loss of speed.

Practical Advice:

• Use examples such as billiard balls or gas molecules to visualize perfectly elastic collisions.
• Practice solving problems where you calculate the final velocities of colliding objects using the conservation of momentum and kinetic energy formulas.

Step 2: Explore Partially Elastic Collisions

Partially elastic collisions are those where momentum is conserved, but kinetic energy is not completely conserved.

Key Characteristics:

• Some energy is transformed into other forms (e.g., sound, heat).
• Objects may stick together or bounce apart after the collision.

Practical Advice:

• Analyze real-world examples such as a rubber ball hitting a surface—some energy is lost in the form of sound and heat.
• Use equations to compare initial and final kinetic energy, noting the energy loss.

Step 3: Learn About Completely Inelastic Collisions

In completely inelastic collisions, the colliding objects stick together after the impact, resulting in the maximum loss of kinetic energy.

Key Characteristics:

• Momentum is conserved, but kinetic energy is not.
• The final mass of the combined objects is greater than the individual masses.

Practical Advice:

• A good example of a completely inelastic collision is a car crash where the vehicles crumple together.

• Practice calculating the final velocity of the combined mass using the conservation of momentum formula:

  m1 * v1 + m2 * v2 = (m1 + m2) * v_final
  

Conclusion

In this tutorial, we covered the three types of collisions in physics: perfectly elastic, partially elastic, and completely inelastic. Understanding these concepts is crucial for solving physics problems and applying them to real-world situations. Next steps include practicing problems and exploring further topics related to momentum and energy conservation. For deeper knowledge, consider reviewing the linked video on impulse and momentum.