AS Further Maths Check answers (and maybe help if wrong)

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UserName734
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Hi I was looking for some help to check my answers to some questions
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JordanGracia
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(Original post by UserName734)
Hi I was looking for some help to check my answers to some questions
ok I will help and are gay
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UserName734
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UserName734
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(Original post by UserName734)
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For part A I got v= root(5gH)
for part B I wasn't sure but got v=root(1/2root(5gH)+gh)
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JordanGracia
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you got it right
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UserName734
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(Original post by JordanGracia)
you got it right
part b too?
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JordanGracia
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(Original post by UserName734)
part b too?
yes
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UserName734
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(Original post by JordanGracia)
and you gay or no
what does that have to do with anything?
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JordanGracia
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IDK
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mqb2766
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(Original post by UserName734)
what does that have to do with anything?
Just ignore/report them. For a) *** it may be right - doing it in my head. What did you do.
Last edited by mqb2766; 4 weeks ago
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JordanGracia
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ok
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UserName734
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(Original post by mqb2766)
Just rignore/eport them. For a) I don;t think its right. What did you do.
Thanks Have done, I will upload a picture of my working
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JordanGracia
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kk
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mqb2766
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(Original post by UserName734)
Thanks Have done, I will upload a picture of my working
Do, but you're correct - was doing it in my head.
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JordanGracia
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good
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mqb2766
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Yup, I'd probalby have said
Initial KE = Final KE + GPE + Work done
To be clear about the signs as that would the be conservation of energy equation, but a) is right.

Checking b) now.
Last edited by mqb2766; 4 weeks ago
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JordanGracia
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ok
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mqb2766
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For b) What is your conservation of energy equation in terms of initial / final KE, GPE, workdone? Smilar to part A.
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UserName734
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(Original post by mqb2766)
For b) What is your conservation of energy equation in terms of initial / final KE, GPE, workdone? Smilar to part A.
intital EK + initial Ep - work done (air resistance) = final Ek
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mqb2766
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(Original post by UserName734)
intital EK + initial Ep - work done (air resistance) = final Ek
I'd always do it in terms of constant (conservation) of energy.
Final KE + workdone = Initial KE + GPE
GPE is measured relative to the floor and the work done is positive moving downwards. So
Final KE = Initial KE + GPE - workdone
where each of these terms should be positive. What do you get if you do that?
Last edited by mqb2766; 4 weeks ago
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