Uploaded May 2025 | Updated September 2026, 2 weeks ago

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Last Minute Sessions: zphysicslessons.net/physics-tutoring

In today's video we look at a good preparation question for Paper 1 for all exam boards including AQA, OCR A, Edexcel and similar courses such as WJEC, Eduqas and IB and also for AS Physics.

Paper: pmt.physicsandmathstutor.com/download/Physics/A-level/Past-Papers/OCR-Old/Unit-4/January%202011%20QP%20-%20Unit%204%20OCR%20Physics%20A-level.pdf

Please note that I am not affiliated with the exam board and this is just my approach to the problem and mistakes can happen. Please leave a comment if you spot a different approach or a mistake.

Chapters:
00:00 Definition - conservation of momentum
00:16 Definition - inelastic collision
00:25 Momentum Calculation
01:40 Showing an inelastic collision
02:34 Volume of a displaced fluid - important
04:32 Newton's Laws for variable mass
05:39 Forces Balance