To calculate the acceleration of a metal object towards a magnet, one can use the formula a = f/m, where f is the magnetic force and m is the object's mass. The magnetic force varies with distance, increasing as the object approaches the magnet, which affects the acceleration at different points in space. To determine the magnetic force at a specific distance, additional calculations or formulas related to magnetic fields and distances are required. The discussion highlights the need for clarity on how to calculate magnetic force in relation to distance. Understanding these principles is essential for accurately predicting the object's behavior in a magnetic field.