Recent content by 1barcafan

  1. 1

    Dot product and cross product of vectors in Cartesian form

    thank you! i love this guy, but i didn't know he had videos on this.
  2. 1

    Dot product and cross product of vectors in Cartesian form

    URGENT HELP! cartesian form vector help! Homework Statement given the following vectors, calculate Adotb and BxA. Express your answers in cartesian Form A= +6X-3Y+4Z B= -3X+1Y-5Z Homework Equations The Attempt at a Solution My teacher went over this in about five minutes making...
  3. 1

    Merry-go-round at rest, inertia, kid running on it problem.

    Homework Statement a 45kg child runs with a speed of 3.50m/s tangential to the rim of a stationary merry-go-round that has a momentum of inertia of 555 kg m^2, and a radius of 2.45m. when the child jumps off, the entire system begins to rotate. what is the angular speed of the system...
  4. 1

    Work/energy/kinematics rocket ship problem

    Homework Statement A rocket of initial mass of 2.85x10^6 kg is on the surface of the earth. if the initial acceleration is .20g, what is the required thrust? if the fuel is burned at a rate of 14,500 kg/s, with what speed is it ejected from the rocket? Homework Equations The...
  5. 1

    Plotting (x-xi)/t vs t to find acceleration

    thank you for the quick response. actually the table that i have does not have a column for deltaX, the third column is for position/time (m/s) so doesn't that column already give me the velocity? but are you saying for me to construct a (x-xi)/t VS. t graph i have to take the second time...
  6. 1

    Plotting (x-xi)/t vs t to find acceleration

    Help in constructing a "(x-xi)/t vs t" graph Homework Statement I am asked to construct a "(x-xi)/t vs t" graph. from the graph determine th eobject's acceleration. state the equation of the graph and explain how i determined the acceleration. Homework Equations The Attempt at a...
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