def acceleration(force, mass):
    """
    Calculates the acceleration through force devided by mass.
    @param force: force as a vector
    @param mass: mass as a numeric value. This should be not 0.
    @return: acc the acceleration
    
    >>> acceleration(300, 30)
    10.0
    """
    #print "mass: ", mass
    #print "force: ", force
    acc = force/mass
    return acc