Quick questions on Mechanical advantage, velocity ratio and efficiency - SQA National 5 Engineering Science

3short 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 lifts a

900 \text{ N}

load with a

300 \text{ N}

effort. Calculate the mechanical advantage. [2 marks]

What is q2?

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A machine has MA

= 2

and VR

= 2.5

. Calculate the efficiency. [2 marks]

What is q3?

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State why a real machine can never be 100% efficient. [1 mark]

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