- #1
Bling Fizikst
- 107
- 13
- Homework Statement
- refer to image
- Relevant Equations
- refer to image
Writing force equations for block
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NoPeroK said:Have you done any Lagrangian mechanics?
It should come out from conservation of AM and energy. You're aiming for an equation forBling Fizikst said:No
Bling Fizikst said:where
I did that but how do i deal with the potential energy of the system :PeroK said:... differentiating the energy equation should work.
You should be able to express that in terms ofBling Fizikst said:I did that but how do i deal with the potential energy of the system :
Need help on this , really deadstuck . Writing forces and usingPeroK said:You should be able to express that in terms of.
What precisely is stopping you from writing down an expression forBling Fizikst said:I did that but how do i deal with the potential energy of the system :
How does the position of the mass M depend onBling Fizikst said:Need help on this , really deadstuck . Writing forces and usingdoesn't seem to help?
What happens toBling Fizikst said:Is it -Mgr
Yes. Note thatBling Fizikst said:it goes up so +Mgr? please forgive me if i am acting dumb , this is my first time using the potential energy function in this way
That's the right answer, but I'm not sure quite how you got there.Bling Fizikst said:
PeroK said:That's the right answer, but I'm not sure quite how you got there.
No need to consider only small oscillations?vela said:implies .
I wonder whether you replacedBling Fizikst said:I did that but how do i deal with the potential energy of the system :
In any case, the solution only applies to small oscillations. You will need an approximation somewhere.Bling Fizikst said:
YesPeroK said:I wonder whether you replacedwith here? To get from the above equation to this:
The idea is that you do these problems yourself. Not just to find a solution online.Bling Fizikst said:Anyways , i found a really elegant solution in David Morin : View attachment 342284
This was a new learning experience for me , so i don't really mind . But i do agree that one should try to solve problems on their own . At the end , it just matters that i learnt to solve it even if i had to look at the solution.PeroK said:The idea is that you do these problems yourself. Not just to find a solution online.