"A snowball, initially of mass m, slides down a slope inclined at an angle φ with
respect to the horizontal. As it moves, the mass of additional snow Δm = αx that it
accumulates is proportional to the distance travelled x. Write the differential equation
of translational motion for the snowball, ignoring rotation and friction. "
I was sure mass was irrelevant in this situation? But judging by the question its not. Could anyone help me out?