if a girl pulls on a 15 kg wagon with a constant horizontal force of 35N.Her friend pushes on the wagon in the same direction with a constant horizontal force of 10 N. and there is a friction force of 15 N. I need to draw a diagram of this problem and calculate the Net Force on the wagon. If there are no other horizontal forces on the wagon, and all the forces on the diagram are constant, what is the wagon's acceleration in meters per second? Could you please give me a step by step formula for this problem?