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Effective Strategies for Answering Questions

Learn how to answer questions effectively by reading carefully, structuring your answer, identifying principles, and showing your working. Understand basic laws and principles and use diagrams and clear writing. Practice with sample questions.

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Effective Strategies for Answering Questions

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  1. Outreach

  2. How to answer questions • Read the question carefully. • Read it carefully AGAIN. • Ask yourself why they have given you all the bits of information. • Even tiny words and phrases may be hints, or vital to the solution.

  3. How to answer questions • Think carefully about how to structure your answer. • Think some more. • Identify the physics principles behind the question.

  4. How to answer questions • For calculations, look for an elegant solution

  5. How to answer questions • When you do need a longer derivation or calculation, show ALL the stages in your thinking and working • Lay out your work carefully. • Check and recheck your answers. • Think about the size of your answer – is it likely?

  6. How to answer “explain” questions • Sort out your thoughts before you write anything. • Plan your argument logically. • Use a list at the side to jot down thoughts and get them in order. • Use a flow chart if you like. • Write clearly and concisely – don’t waffle.

  7. How to answer questions • You must know the basic laws and principles. • Learn them and know their names. • Make sure you know their conditions e.g. “at constant temperature”, “in the absence of an external force”.

  8. How to answer questions • Any question involving forces will benefit from a free-body diagram. • Only draw the body in question. • Draw and label the forces with their names. • Get the directions and sizes about right. • Blunt end of arrow at the point where the force acts • Weight acts at centre of mass of object

  9. How to answer questions Now try the questions (b) and (c) from the 2006 paper in your booklet.

  10. The window cleaner (b) Why “constant velocity”? Pull of rope on cage (T) Pull of rope on man (T) Weight of man and cage

  11. The window cleaner (b) • 2T= 115 x g • 2T= 1150N • T = 575N

  12. The window cleaner (c) • T = 2π√(l/g) • How can T possibly change? • What is l for the bucket of water? • As the water runs out what happens to l? • What will happen to T? • What happens to l when no water remains?

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