Assignment:
A little red wagon with a mass of 4.60 kg moves in a straight line on a frictionless horizontal surface. It has an initial speed of 10.0m/s and then is pulled 4.0 m by a force with a magnitude of 18.0 N in the direction of the initial velocity.
a) Use the work-energy relation to calculate the wagon's final speed.
b) Calculate the acceleration produced by the force.