An engineer is testing the aerodynamics of a scale model sports car in a wind tunnel.
State the equation that relates the resultant force (FFF) acting on an object, its mass (mmm), and its acceleration (aaa).
During one trial, the scale model has a mass of 0.64 kg and experiences a horizontal resultant force of 0.435 N.
Calculate the acceleration of the model car. Give your answer to 2 significant figures.