Motion in a Straight Line
Kerala Board · Class 12 · Physics
Quick revision notes for Motion in a Straight Line — Kerala Board Class 12 Physics. Key concepts, formulas, and definitions for last-minute revision.
Key Topics to Revise
Distance and Displacement
- Distance is the total path length covered by an object during motion (scalar quantity)
- Displacement is the shortest distance between initial and final positions with direction (vector quantity)
- For motion in same direction: distance = magnitude of displacement
Speed and Velocity
- Speed is the rate of change of distance with time (scalar)
- Velocity is the rate of change of displacement with time (vector)
- Average speed = Total distance / Total time
Relative Velocity
- Relative velocity is velocity of one object as observed from another moving object
- If objects move in same direction: v_rel = v₂ - v₁
- If objects move in opposite directions: v_rel = v₁ + v₂
Acceleration
- Acceleration is the rate of change of velocity with time
- Average acceleration = (v₂ - v₁) / (t₂ - t₁)
- Instantaneous acceleration = dv/dt (slope of velocity-time graph)
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Motion in a Straight Line covers several key topics that are frequently asked in Kerala Board Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
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Sources & Official References
- Kerala Board of Public Examinations — keralapareekshabhavan.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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