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ZIMSEC O-Level Physics

3.1Effect of force on shape and size of materials

Effect of force on shape and size of materials in ZIMSEC O-Level Physics: what the syllabus expects you to know, the learning objectives and how to practise.
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Overview

Form 3.

Learning objectives

What the syllabus expects you to be able to do.

  1. 3.1.1Explain how a force changes the size and shape of a material, including tension and compression.
  2. 3.1.2Plot, draw and interpret load-extension graphs.
  3. 3.1.3Explain Hooke's law.
  4. 3.1.4Calculate the spring constant.

Lessons

  • Forces and changes of shape: Hooke's law

    25 min

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Sample question

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

Effect of force on shape and size of materials: sample question

1 mark

A spring is 15.0 cm15.0\ \text{cm} long with no load and 19.5 cm19.5\ \text{cm} long with a load attached. What is its extension?

Answer in cm.

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