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Mechanics - urgent help please

3ACB8BD1-C6B7-463F-A16C-15F87F1D6195.jpg.jpeg9B18B6B4-6420-4F39-A24E-3BDD36E1487A.jpg.jpeg

I have these mechanics questions. And I’m very confused about part iii. Any hints and tips on where to start would be much appreciated!
The first photo is my attempt at part i and ii
Reply 2
Avatar for mqb2766
mqb2766
21
i) isnt uploaded and would be helpful to see.
ii) Cant see your attempt at the ode?
Original post by mqb2766
i) isnt uploaded and would be helpful to see.
ii) Cant see your attempt at the ode?


Sorry didn’t know photos didn’t upload 91B0D762-9571-49BC-9FB3-9D9EE178A70C.jpg.jpeg4BFC8E94-8EA1-4C54-9095-B2AA3A7437CE.jpg.jpeg

Has this worked?
453AF36E-52D7-42ED-B31D-203C4B25517A.jpg.jpeg16.7KB
Reply 4
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mqb2766
21
looks ok. So what is the ode in terms of v?
Original post by mqb2766
looks ok. So what is the ode in terms of v?


Is that my answer to part ii) ??
6B43C385-1CA8-4276-ACDB-D3FB899C6EC4.jpg.jpeg
Original post by mqb2766
looks ok. So what is the ode in terms of v?


Is that my answer to part ii) ?
Reply 7
Avatar for mqb2766
mqb2766
21
there is no derivative, thats not the ode.
Original post by mqb2766
there is no derivative, thats not the ode.


If I put as dx/dt for v?
Original post by mqb2766
there is no derivative, thats not the ode.


I had it down as dx/dt to make it an ODE
Original post by littlebitthick
I had it down as dx/dt to make it an ODE

Im not sure what youre proposing. There are lots of examples of getting an ODE from newtons laws of motion.
Original post by mqb2766
Im not sure what youre proposing. There are lots of examples of getting an ODE from newtons laws of motion.

Sorry I think I'm just very confused and don't even know where to start
Original post by littlebitthick
Sorry didn’t know photos didn’t upload 91B0D762-9571-49BC-9FB3-9D9EE178A70C.jpg.jpeg4BFC8E94-8EA1-4C54-9095-B2AA3A7437CE.jpg.jpeg

Has this worked?

if you replace a with dv/dt that will help you
and, as well as bears hint, a similar, worked example
https://www.youtube.com/watch?v=K7Hy9KJ48YQ&ab_channel=KeysToMaths1
(edited 2 years ago)

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