Recent content by yttuncel

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    Engineering Analysis of a RLC circuit and a Voltage Controlled Switch

    Hello, By saying "on" I meant switch is open. No, all the current go directly to ground when switch is closed. The current charges up both capacitors very fast due to small time constant(Rin and 0.05μF) to a maximum voltage value of VA. Vout is the voltage on Cout. The time constant of...
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    Engineering Analysis of a RLC circuit and a Voltage Controlled Switch

    Hello everybody, I am stuck with a circuit that involves voltage controlled switch. Homework Statement The switch is controlled with a square wave generator, Vs1, whose frequency is 100kHz. As far as I know, switch is off when source is on positive phase and vice versa. Therefore, I only...
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    Calculating Moment of Inertia of a cube

    To gneill, I would say density=ρ=M/ab so what şs dm equal to ? Is it dm=ρ*x*y r2=x2+y2 r=sqrt(x2+y2) So now, ∫dm.r2, but dm is not the one above.. To BetoG93, yes i found it (method to find it with triple Integral) on the net, but that lacked explanation unfortunately
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    Calculating Moment of Inertia of a cube

    Of course, that was my main and actual argument.
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    Calculating Moment of Inertia of a cube

    Well as far as I know, it is ML^2/6. But the problem is that I can not find it myself, I don't want to memorize them (the formulas for moment of Inertia).
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    An overall question about rotational dynamics

    Oops you are right. It is ΔU=mg(r+L/3)-mg(r+2L/3)-MgL/6
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    Calculating Moment of Inertia of a cube

    Ok I will definitely think about it. Now we have ρ=M/L and thus dm=(M/L)dz SO I=∫dmr2 I=∫M/Lr2dz Now I got confused how to integrate this one?
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    An overall question about rotational dynamics

    ΔU=mg(L/3+r)-mg(2L/3+r)-MgL/3 isn't this the change in gravitational potential energy? So i will equalize 1/2Iw^2 with the one above right? And -I- will be the one in part c right?
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    An overall question about rotational dynamics

    Vel. should be max when the right hand sphere is at the bottom. Right sphere's velocity = V1 = w(2L/3+r) Left sphere's velocity = V2 = w(L/3+r) Rod's center of mass's velocity = V3 = w(L/6) ΔK+ΔU=0 ΔK=1/2m(V12+V22)+1/2MV32 ΔU=mg(L/3+r)-mg(2L/3+r)-MgL/3 Anything else I should do?
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    Calculating Moment of Inertia of a cube

    Btw, your dm and the one i used are the same, arent they?
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    Calculating Moment of Inertia of a cube

    Wow. But I still can not understand how we can consider a plate as a linear object? I mean, isn't that applicable to one dimensional rods ?
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    An overall question about rotational dynamics

    Ok, I got it. For part d) I calculated net torque on the system. τ=-m(r+L/3)+M(L/6)+m(r+2L/3) τ=L/6(2m+M) Now ? τ=I*α How will I relate to velocity? We do not know Δt
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    An overall question about rotational dynamics

    Homework Statement A dumbbell is made of a rod length L and mass M, and 2 spheres of radius r and mass m (see figure). The rod is attached at a distance L/3 from the left end to a rotational axis A. The dumbbell is let go under gravity and makes a rotational motion under gravity around the...
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    Calculating Moment of Inertia of a cube

    Homework Statement Find the moment of Inertia of a cube (mass M, length L) around an axis going through one of the edges. Homework Equations I=Ʃmr2 The Attempt at a Solution Well I imagined the cube is formed of infinitely many square plates. The width of the square plate is dL...
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    Combination of conservation laws, and older things. Need Help.

    Didnt even see that mentioned in the question :/ Thank you both for your comments and help :) Edit: I think I did it wrong again. Because the final velocity on the table is not equal to the velocity just after the collision Edit2: Ok got it. Lol. Thanks again!
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