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# shm - have I got it? watch

1. Having now completed all the SHM questions in edexcel M3 book and all those in Understanding Mechanics that are appropriate to M3, I think the penny might have dropped.

I've made myself some notes on the different behaviour of STRINGS and SPRINGS. As I'm not in education - so no teacher to ask - I would greatly appreciate it if someone would check my notes to see if my thoughts are correct or not.

Thanks. There's no hurry as I'm giving M3 a break for a couple of weeks.

Notes in attachment.
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2. Scan0012.pdf (418.8 KB, 57 views)
3. (Original post by maggiehodgson)
Having now completed all the SHM questions in edexcel M3 book and all those in Understanding Mechanics that are appropriate to M3, I think the penny might have dropped.

I've made myself some notes on the different behaviour of STRINGS and SPRINGS. As I'm not in education - so no teacher to ask - I would greatly appreciate it if someone would check my notes to see if my thoughts are correct or not.

Thanks. There's no hurry as I'm giving M3 a break for a couple of weeks.

Notes in attachment.
I skimmed over it, your ideas seem correct. Though I can't stress this enough, pay attention to weather it is a string or a spring. Strings are more tricky cuz when the length is less than the natural length (negative extension), the tension is zero, unlike a spring, where the direction of the tension reverses. So when you're reading the questions in the exams, highlight or write down in capitals the word string or spring, to remind yourself.
4. (Original post by gagafacea1)
I skimmed over it, your ideas seem correct. Though I can't stress this enough, pay attention to weather it is a string or a spring. Strings are more tricky cuz when the length is less than the natural length (negative extension), the tension is zero, unlike a spring, where the direction of the tension reverses. So when you're reading the questions in the exams, highlight or write down in capitals the word string or spring, to remind yourself.
Thanks

I think I have tried to work out the differences between strings and strings in my notes so if you think they're ok then perhaps I've got it AT LAST.

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