Quick questions on Energy, work and power: conservation, kinetic and potential energy, P = Fv and efficiency - Eduqas A-Level Physics

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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State the principle of conservation of energy. [1 mark]

What is q2?

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0.50\ \text{kg}

ball moves at

6.0\ \text{m s}^{-1}

. Find its kinetic energy. [2 marks]

What is q3?

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A motor delivers

2.0\ \text{kW}

of useful power while consuming

2.5\ \text{kW}

. Find its efficiency. [2 marks]

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