Скачать или смотреть IB Physics A.3 - Work, energy and power (Part 1 - Understanding Work & Work done) [SL/HL]

📚 Part of the classroom series for International Baccalaureate Diploma Programme (IBDP) Physics this video covers:
Unit (A) Space, time and motion
Chapter (A.3) Work, energy and power
This video specifically covers:
Definition of Work in physics vs everyday usage
Work = F·s cosθ; when work is positive, zero, or negative
Units (Joule), scalar nature of work, typical misconceptions
Energy Transfer View of work (intuitive “bank account” analogy)
Gas Work: W=PΔV and pressure–volume intuition
Variable Force: area under F–s graph = work (with examples)
Ohm’s law style reasoning for mechanics: applying formulas sensibly
Power basics and derivation of P=Fv
Conservation of Energy & Sankey diagrams (SL & HL relevance)
Multiple worked examples: angles, opposing forces, ramps, and graphs

Why this matters (Exam Relevance)
IB DP Physics (SL/HL): Core mechanics—frequent structured & data-based questions
Graph interpretation: F–s and P–V skills carry over to Paper 2/3 tasks

👩‍🏫 Checkout the IB Physics full course playlist -    • 🧲 IB Physics Full course  

👩‍🏫 Checkout the classroom series(IGCSE and O LEVEL full course) playlists:
(Maths) Full course with Topical PYQ's -    • 🔢  Maths Classroom series with Topical PYQ...  
(Physics) Full course with Topical PYQ's -    • 🧲 Physics Classroom series with Topical PY...  
(Chemistry) Full course with Topical PYQ's -    • ⚛️ Chemistry Classroom series with topical...  
(English) Full course -    • ✍️ English Classroom series with topical P...  

⏱️ Timestamps
00:00 – Precap
01:38 – Guide & Understandings (SL/HL goals, conservation of energy, Sankey idea)
03:25 – Defining Work (F·s, F·s cosθ, sign of work, examples)
09:53 – Work Done by a Gas (W = PΔV, pressure–area link)
15:05 – Example Questions (incl. negative work cases)
21:20 – Work by Variable Force (area under F–s graph)
24:24 – Example Questions (trapezium/triangle areas, mixed signs)
30:21 – Thank You & what’s next (Energy forms & Power deep-dive)

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