Alright so I just wrote an AP physics test and one of the true or false questions was: A horse pulls a cart and the cart pulls back on the horse with the same force. Does the cart move? (the cart starts at rest) I said false because in order for an object to move it needs a net force but if the two opposing forces cancel out and the net force is zero then the object wont move. Is my though process right? or am I missing something here?