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Cambridge AS & A Level Physics

3.1Momentum and Newton's laws of motion

Momentum and Newton's laws of motion in Cambridge AS & A Level Physics: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic47 practice questions2 lessons

Learning objectives

What the syllabus expects you to be able to do.

  1. 3.1.1Understand mass as the property that resists a change in motion.
  2. 3.1.2Recall and use F = ma, with acceleration in the direction of the resultant force.
  3. 3.1.3Define and use linear momentum.
  4. 3.1.4Define and use force as the rate of change of momentum.
  5. 3.1.5State and apply Newton's three laws of motion.
  6. 3.1.6Describe weight as the effect of a gravitational field on a mass and recall W = mg.

Lessons

  • Linear momentum and force as rate of change of momentum

    40 min

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  • Mass, weight and Newton's laws of motion

    45 min

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Sample question

A sample question on this topic. Answer it, check it, then read the worked answer.

Momentum and Newton's laws of motion: sample question

1 mark

What is the momentum of a 0.45 kg0.45\ \text{kg} football moving at 20 m s−120\ \text{m s}^{-1}?

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