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ZIMSEC O-Level Physics

4Machines

Machines in ZIMSEC O-Level Physics: what the syllabus expects you to know, the learning objectives and how to practise.
Topic24 practice questions2 lessons

In this topic

Lessons

  • Efficiency

    20 min

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  • Simple machines: levers, pulleys and inclined planes

    30 min

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Sample question

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

Machines: sample question

1 mark

A light bulb is supplied with 200 J200\ \text{J} and gives out 50 J50\ \text{J} as light. Calculate its efficiency.

Answer in %.

Turn Machines into a strength.

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