Recent content by kylinsky

  1. K

    Taylor mechanics ch3 problem7 -- Men jumping off of a railcar

    i did follow the help response and add the derivation to my solution.
  2. K

    Taylor mechanics ch3 problem7 -- Men jumping off of a railcar

    Homework Statement two man,each of equal mass m,are standing at one end of a stationary railroad flatcar with frictionless wheel and mass mcar.Find the car's speed if the two men run to the other end of the car and jump off simultaneously with the same speed u(relative to the car) Homework...
  3. K

    Taylor mechanics chap3,problem 4

    Homework Statement two man,each of equal mass m,are standing at one end of a stationary railroad flatcar with frictionless wheel and mass mcar.Find the car's speed if the two men run to the other end of the car and jump off simultaneously with the same speed u(relative to the car) Homework...
  4. K

    Proof -- motion under a central force in text Symon Mechanics

    thanks!
  5. K

    Proof -- motion under a central force in text Symon Mechanics

    1. The derivation In a 3-dim space,a particle is acted by a central force(the center of the force fixed in the origin) .we now take the motion entirely in the xy-plane and write the equations of the motion in polar coordinate how can i derive from these equation that T(kinetic...