Recent content by Andrax

Second picture is he same system but from uppoint of view , it gives me diffrent results

Homework Statement So a body $m$ is on a uniform circular motion ($\omega = d\theta/dt = \text{constant}$), it is suspended by an inextensible rope with negligeable mass Homework Equations P = mg , didnt know what to put here The Attempt at a Solution So this is what the book did. What I...

got it nevermind, you have to assume that the acceleration is decreasing in order to get the correct result

help?

Dosent this mean that Mass 2 is moving to the right , and mass 3 is moving upwards , whichis impossible ? working the same problem and I'm stuck here

Homework Statement Homework Equations X1=X3? The Attempt at a Solution Do M1 ANd M3 have the same horizontal acceleration?

thank you , the differential equations gives me w(t)=2 if i use V=rw , i just presumed that since it's alays used in these kind of problems

In the solution , it says we have dr/dt= -V (polar coordinates) How? i can't see how this can be possible , we know that r(t)=V/w(t), and that's it .

lol makes sense now , i though i had a genius idea

the velocity of the jet will add to the velocity of the particles , so they will be have greater velocity right?

fixed the problem (h ad to do with angle being negatgive which means the work of p is negative) sorry my explication of the question was off , close this thread

at the point of rest of the pendulum (same as O)

we have an inversed pendulum(ignore the car) and we choose the coordinate system to be upwards the potential energy PE=mgz (z will be hegative since( O,k) is upwards right?) z is always under O. but in the textbook they basically take the absolute value of h i don't understand why?

suppose that the molar concentration of (2k+ , (S2O4)2-) is C=1mol/l we have C((S2O4)2-)=C=1mol.l but does C(2k+)=1 mol/l ? or 2C=2mol/l(since there are 2 k+ ) this question might be silly , but this really confused me and i can't come up with the correct answer

i solved the issue now , thanks ,everything is clear, ( i meant for an unspecific x let f(x))=x^2 then i'd have to prove by induction ..