1. The problem statement, all variables and given/known data According to legend, a horse learned Newton's laws. When the horse was told to pull a cart, it refused, saying that if it pulled the cart forward, according to Newton's third law there would be an equal force backwards. Thus, there would be balanced forces, and, according to Newton's second law, the cart wouldn't accelerate. How would you reason with this horse. 2. Relevant equations a=f/m 3. The attempt at a solution Well I don't really know it was in interesting question that I found while reading through them and thought someone on hear might know.