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# Physics-Extension of a spring to nearest mm

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1. Hello!

I calculated my mean extension value for a spring when mass is loaded onto a spring and measured the extension in cm. I got 2.6cm as the extension.

But I was asked to calculate it to the nearest mm!
What is 2.9cm to the nearest mm? Also what is 14.9cm to nearest mm?

Thanks,
Anna.
2. Sorry you've not had any responses about this. Are you sure you've posted in the right place? Here's a link to our subject forum which should help get you more responses if you post there.

You can also find the Exam Thread list for A-levels here and GCSE here.

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(Original post by Puddles the Monkey)
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3. (Original post by Anna-18)
Hello!

I calculated my mean extension value for a spring when mass is loaded onto a spring and measured the extension in cm. I got 2.6cm as the extension.

But I was asked to calculate it to the nearest mm!
What is 2.9cm to the nearest mm? Also what is 14.9cm to nearest mm?

Thanks,
Anna.
As, 0.1 cm = 1 mm, 2.9cm and 14.9cm are 2.9cm and 14.9cm respectively.
Had it been 14.666666...cm then to the nearest mm it would be 14.7cm.
4. (Original post by Anna-18)
Hello!

I calculated my mean extension value for a spring when mass is loaded onto a spring and measured the extension in cm. I got 2.6cm as the extension.

But I was asked to calculate it to the nearest mm!
What is 2.9cm to the nearest mm? Also what is 14.9cm to nearest mm?

Thanks,
Anna.

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