Collisions in Physics | Definition, Types, Derivations & Examples

In this essential mechanics tutorial, we break down Collisions in Physics from the absolute ground up. A collision occurs when two or more moving bodies exert relatively strong forces on each other for a relatively short period of time. Mastering how to set up collision equations and track momentum conservation is a guaranteed way to secure maximum marks on your upcoming physics papers. We walk you through this high-yield physics workspace step-by-step: The True Definition of a Collision: Understanding the physical interactions, contact intervals, and internal forces that occur when masses interact dynamically in a closed linear system. The Principle of Conservation of Linear Momentum: Explaining the universal golden rule of collisions. In an isolated system (where no external forces act), the total momentum before collision is perfectly equal to the total momentum after collision. The Two Main Types of Collisions: Eliminating the number-one point of confusion for students: Elastic Collisions: Both total linear momentum AND total kinetic energy are perfectly conserved. The objects bounce off each other cleanly without losing energy as heat or sound. Inelastic Collisions: Total linear momentum is conserved, but total kinetic energy is NOT conserved (it is lost to the surroundings as heat, sound, or structural deformation). If the objects stick together and move with a common velocity after the impact, it is called a Perfect Inelastic Collision. Derivation of the Collision Formulas: We derive the algebraic setups from scratch so you can see where they come from: Separate Objects (Elastic/Inelastic): m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂ Sticking Together (Perfect Inelastic): m₁u₁ + m₂u₂ = (m₁ + m₂)v (Where m represents mass, u represents initial velocity, and v represents final velocity). The Vector Direction & Sign Trap: Revealing the examiner secret! If two objects are moving toward each other (opposite directions), one of their initial velocities must be given a negative sign (e.g., -u₂). We show you how to apply this rule so you never make careless calculation errors. Authentic JAMB UTME & WAEC Past Questions: Working through a series of practical, numerical calculation problems step-by-step so you can build real test-day confidence and solve CBT collision questions effortlessly in seconds. This video directly aligns with universal physics standards taught in Senior Secondary Schools, Class 10 and 11 Physics, WAEC/WASSCE, NECO, JAMB UTME, Post-UTME, and introductory College Physics courses. It serves as an invaluable, highly targeted revision resource for science and engineering students sitting for competitive entrance examinations worldwide. 🎓 Welcome to Excellent Link Academy! I'm Ganiyu Abubakar, an educator, content creator, and founder of Excellent Link Academy. On this channel, you'll find educational tutorials, academic success strategies, science lessons, YouTube growth tips, digital skills training, and much more. ━━━━━━━━━━━━━━━━━━━━ ⭐ JOIN VIP MEMBERSHIP Get access to exclusive content, special tutorials, member-only benefits, and premium resources:    / @excellentlinkacademyofficial   ━━━━━━━━━━━━━━━━━━━━ 🌐 VISIT MY OFFICIAL WEBSITE Access courses, study materials, and educational resources: https://www.ganiyuabubakar.com ━━━━━━━━━━━━━━━━━━━━ 📚 GET MY BOOK "The Shortcut to Academic Success" https://selar.com/aa84051788 ━━━━━━━━━━━━━━━━━━━━ 📱 JOIN MY WHATSAPP CHANNEL Get updates, study tips, and exclusive content: https://whatsapp.com/channel/0029Vb5h... ━━━━━━━━━━━━━━━━━━━━ 👨‍🏫 NEED A PRIVATE TUTOR? Send a WhatsApp message: +2349123155603 ━━━━━━━━━━━━━━━━━━━━ 👥 JOIN OUR OFFICIAL WHATSAPP GROUP https://chat.whatsapp.com/BHFYO4RtFsv... ━━━━━━━━━━━━━━━━━━━━ 🎵 FOLLOW ME ON TIKTOK   / excellentlinkacademy   📸 FOLLOW ME ON INSTAGRAM   / ganiyu_abubakar_   ━━━━━━━━━━━━━━━━━━━━ 🔔 Subscribe and turn on notifications so you never miss a new upload! #ganiyuabubakar #excellentlinkacademy #education #onlinelearning #scienceeducation #academicsuccess #studytips #physics #chemistry #youtubegrowth #digitalSkills #mathematics #ganiyuabubakar #excellentlinkacademy #ganiyuabubakar #excellentlinkacademy #ganiyuabubakar #excellentlinkacademy #ganiyuabubakar #excellentlinkacademy #ganiyuabubakar #excellentlinkacademy #ganiyuabubakar #excellentlinkacademy