Can you solve these physics riddles? ft Simone Giertz - Part 1/3

Heavy ball mass = M
Light ball mass = m
Apply F=ma to each:
              Heavy: F=M*g
              Light: F = m*g
g being a constant (9.81ms^-2 on Earth), this leaves the only affecting factor of resultant force to be mass. Lighter object has lower mass, hence a lesser force pulling it down.

Since both bodies are travelling at a constant velocity (terminal), resultant force = 0. This means without any external forces, force of air resistance = force of gravity. We've established the lighter object has a lower force of gravity, ergo it also has a lesser force of air resistance.

Therefore the correct answer to the problem is the heavier ball.