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Learning objective

Recognize that an object will stay at rest or move in a straight line at constant speed unless a resultant force acts on it.

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

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Quick explanation

Recognize that an object will stay at rest or move in a straight line at constant speed unless a resultant force acts on it

  • This point belongs to Effects of forces, especially Effects of forces outcomes.
  • You need to be able to recognize that an object will stay at rest or move in a straight line at constant speed unless a resultant force acts on it.
  • The key ideas to know are Know and State.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

KnowState

Why it matters

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

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Paper 3 structured question: Effects of forces

Paper 3Theory (Core)1 marks

Description

Newton's First Law

An object is at rest on a flat surface. No forces are acting on it.

  1. a

    State what will happen to the object if no resultant force acts on it?

    Aim for approximately 1 distinct marking point.

    [1]
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