System and transfer
Define the system and identify how energy or momentum is transferred. Conservation applies to the correct system and time interval.
Panhellenic Exams / Physics / Curriculum
Κρούσεις και σχετική κίνηση: structured theory, worked examples, answered practice, and a mastery checklist for Panhellenic Exams.
Unit
The essential chapter ideas in a clear sequence before practice.
Define the system and identify how energy or momentum is transferred. Conservation applies to the correct system and time interval.
Write initial and final quantities before substituting numbers. This exposes losses, external work, and direction.
Energy describes an amount, while power describes its transfer rate. Do not compare systems using work alone when time matters.
Physics
Follow the method step by step and check why every step is valid.
A 4 kg body moves at 4 m/s. Find its kinetic energy and momentum.
Physics
Strict methodology by question: diagram, principles/laws, equations, numerical accuracy, and qualitative explanation.
The structure follows the official textbook layout and is used to organise study.
The areas that usually create mistakes or need extra revision.
Ek = 32 J, p = 16 kg·m/s
Before calculating, explain the key idea from “Κρούσεις” and which conditions must be checked.
The answer should show not only which rule is used for “Κρούσεις”, but also why it is valid here.
Κρούσεις και σχετική κίνηση
Try independently, use the hint if needed, then open the answer guide.
1. Explain the idea and give one correct foundation example for “Κρούσεις”.
Write known quantities in SI units, draw a diagram where useful, and state the law before substitution.
A complete answer links “Κρούσεις” to a physical law or model, correct units, and an interpretation.
2. Solve an application and show every intermediate step for “Κεντρικές ελαστικές κρούσεις”.
Write known quantities in SI units, draw a diagram where useful, and state the law before substitution.
A complete answer links “Κεντρικές ελαστικές κρούσεις” to a physical law or model, correct units, and an interpretation.
3. Compare a correct and an incorrect approach and justify the difference for “Σχετική κίνηση”.
Write known quantities in SI units, draw a diagram where useful, and state the law before substitution.
A complete answer links “Σχετική κίνηση” to a physical law or model, correct units, and an interpretation.
Where to start: textbook, daily material, PDFs, videos, and worked examples.
Targeted practice before full tests so coverage is clear.
How to measure progress in this chapter and when it enters a cumulative mock.
What to do after finishing the chapter and how it connects to the next unit.
Note: for the official examinable syllabus of each school year, always confirm with the school, tutor, and current Ministry/IEP announcements.