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    Can anyone help find where I've gone wrong (Q3)?
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    (Original post by pippabethan)
    Can anyone help find where I've gone wrong (Q3)?
    It's a string, not a spring - it won't have any EPE at A, for obvious reasons. Whilst a spring is compressed and stores EPE when compressed beyond its natural length, a string simply becomes limp once its length is smaller than the natural length, can you imagine this?

    Hence, for A: 40 =  \mathrm{KE} + \mathrm{GPE} only.
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    (Original post by Zacken)
    It's a string, not a spring - it won't have any EPE at A, for obvious reasons. Whilst a spring is compressed and stores EPE when compressed beyond its natural length, a string simply becomes limp once its length is smaller than the natural length, can you imagine this?

    Hence, for A: 40 =  \mathrm{KE} + \mathrm{GPE} only.
    Thank you! Makes sense now
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    (Original post by pippabethan)
    Thank you! Makes sense now
    Other than that, good work.
 
 
 
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