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# physics watch

1. Hi, I'm preparing for my test and came across an AQA GCSE question about measuring the extension of a spring using a tilted ruler.

In the diagram, the spring is extended by a weight. And the ruler is not upright and tilted at an angle,say 15%. The question then asks "How would leaving the ruler tilted affect the weight and extension data to be recorded by the student? ". And the answer is "The extension recorded by the student would be ________shorter than__________________ the
actual extension of the spring."

http://filestore.aqa.org.uk/resource...84632F-SQP.PDF (Question 4.2)

I'm confused why it would be "shorter than" and not "greater than" since the measurement on the tilted ruler will be like the hypotenuse of a triangle and therefore longer than the height of the triangle which in this case is the actual extension of the spring.

Any idea? What am I missing? Thanks for your help in advance.

PB
2. I'm an A level student, and I agree, it should be the hypotenuse so it should be greater than the actual extension, i think this mark scheme here is very wrong, or there's something we're both missing?!

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Updated: March 14, 2018
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