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Learning objective

Understand that an object that is speeding up is accelerating, while one that is slowing down is decelerating.

Read the explanation, check the common trap, then practise with flashcards and questions.

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  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE Combined ScienceMotion, forces and energyCore content

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Quick explanation

Understand that an object that is speeding up is accelerating, while one that is slowing down is decelerating

  • This point belongs to Motion, especially Motion outcomes.
  • You need to be able to understand that an object that is speeding up is accelerating, while one that is slowing down is decelerating.
  • The key ideas to know are Explain and Discuss.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

ExplainDiscuss

Why it matters

This objective helps connect Motion outcomes to exam-style questions, flashcards, and revision notes for Motion.

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Paper 3 structured question: Motion

Paper 3Theory (Core)2 marks

Description

Acceleration and Deceleration

An object moving in a straight line increases its speed from 10 m/s to 20 m/s in 5 seconds. Another object decreases its speed from 30 m/s to 10 m/s in 5 seconds.

  1. a

    Analyse Explain the difference between the two objects' motion during the 5 seconds.

    Aim for approximately 2 distinct marking points.

    [2]
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Cambridge IGCSECombined Science resources