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3.4 Mechanics and materials
Quick questions on Work, energy and power: W = Fs cos theta, power and efficiency - AQA 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?Show answer
State the equation linking power, force and velocity. [1 mark]
What is q2?Show answer
A ball moves at . Calculate its kinetic energy. [1 mark]
What is q3?Show answer
State why the efficiency of a real machine is always less than 100 percent. [1 mark]
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