A little red wagon with mass 7.0 kilogram moves in a straight line on a frictionless horizontal surface. It has an initial speed of 4.00 m/s and then is pushed 3.0 meter in the direction of the initial velocity by a force with a magnitude of 10.0 Newton.
a) Use the work-energy theorem to determine the wagon final speed?
b) Obtain the acceleration produced by the force?