Revista mexicana de física E
Print version ISSN 1870-3542
Here we show how to separate into variables the scalar kinematic equation in Cartesian coordinates, a procedure that is little considered in the school texts on general physics, and also the connection between the kinematic expression and the theorem on work and kinetic energy. We also show a generalization of this same kinematic equation.
Keywords : Speed; kinematics; teaching of the mechanics.