Can someone please explain the math of this problem? -If F is the force of air resistance on an object with mass m moving at a constant velocity, which of the following best describes the acceleration of the object when the force of air resistance is reduced by a factor of 4? (a) F/m (b) 1/2 F/m (c) 1/4 F/m (d) 3/4 F/m The answer is d but I do not understand how to get it. Thanks in advance!!