Quick questions on Efficiency of forces - Edexcel GCSE Physics

2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?

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A machine does

60\,\text{J}

of useful work from a total input of

240\,\text{J}

. Calculate its efficiency as a percentage. [2 marks]

What is q2?

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State one way to make a machine with moving parts more efficient. [1 mark]

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