Recent content by aks_sky

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    Is the Motion of a String Described by y(x,t) SHM?

    Homework Statement The displacement y of a long string at position x and time t is given by y(x,t) = cos (kx-wt) + sin (kx-wt) Show that the motion of the string at any point is SHM. The Attempt at a Solution As far as i know this is something to do with adding 2 waves together...
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    Velocity and Acceleration on a Rotating Disk?

    cheers. i get it now
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    Velocity and Acceleration on a Rotating Disk?

    Homework Statement If you are standing on a rotating disk which is rotating at a constant angular velocity and you walk with a speed v along a straight radial line, then what are you velocity and acceleration? Homework Equations The Attempt at a Solution I just wanted to check if...
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    Damped harmonic motion question

    ohhh i see.. no problemo.. thank you
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    Damped harmonic motion question

    I don't know exactly where to go since i am confused about what it is asking for exactly. And to find the value for delta i will be using the tan (delta) = (1/w' tau) and then i guess i can substitute w' = 2*pi/ T' in there and go from there?
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    Damped harmonic motion question

    oh oops i dint see that part. The exponential is going to give me a positive value. How did i forget that. my bad
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    Damped harmonic motion question

    That would be the exponential since we have -t in there. So i guess in this case i am supposed to differentiate with respect to t first?
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    Damped harmonic motion question

    A damped harmonic motion starts from rest at time t=0 with displacement A0 has the equation: x(t) = A0/cos (delta)*e^(-t/tau) *cos (w't + delta) w' is the angular frequency, tau is the time constant and delta is given by: tan (delta) = - (1/w' tau) find the time when the maximum...
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    Bungee Cord Damping and Unstretched Length Calculation

    ok then. thank you!
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    Bungee Cord Damping and Unstretched Length Calculation

    anybody know?
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    Bungee Cord Damping and Unstretched Length Calculation

    I am a bit confused in this problem. A person of mass 80 kg takes a bungee jump. At the lowest point of the jump the bungee cord is 90m in length and then at the lowest point of the next oscillation the cord has a length of 80m. when the person does eventually come to rest the length of the...
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    Rotation, angular momentum and inertia

    sweet.. all sorted.. thank u
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    Rotation, angular momentum and inertia

    The rotor of an electric motor has Im[SUB]= 2 x 10 -3 Kg.m2 about its central axis. The motor is used to change the orientation of a space probe in which it is mounted. If the axis of the motor is mounted parallel to the axis of the probe (I[SUB]p= 12 Kg.m^2) calculate the number of rotations...
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    Find \frac{1}{i+z} as a Power Series in z | Learn to Use Taylor Series

    sweet as.. got it.. cheers
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    Find \frac{1}{i+z} as a Power Series in z | Learn to Use Taylor Series

    oh yup that's cool.. i just had another question.. will i be finding the derivative of f(z) or f(i) for the taylor polynomial?