Can coefficient of restitution be negative?Watch
Hi so I've just had a mechanics exam and one of the questions asked to calculate the coefficient of restitution. I calculated it and got -0.85 but in the multiple choice there was an answer for -0.85 and an answer for +0.85. I've never seen the coefficient be negative in any questions I've done before so I'm doubting my answer now. Could someone clear this up please?
Ffs. There's never been a question where the answer has come out negative before and I'm 100% sure I did the calculation right I've triple checked it. I hate looking over the exam paper after the exam and realising I dropped 4/5 easy marks it's so annoying! Anyway, thanks for your help.
Yeah, so the thing is that 'e' (or coefficient of restituition) can never be negative. The range of 'e' is only from 0 to 1 depending upon the type of collision that takes place. If it's a perfectly elastic, e = 1 and if it's perfectly inelastic, e=0. All the other values vary differently because the type of collision it undergoes is more or less close to such collisions.Hope I could help.Cheers mate.
I'm closing this one
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