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

Answer: The Heavy ball

Here's why:
At terminal velocity, the upwards and downwards forces cancel out. Since the only two forces acting on either ball is gravity and air resistance, this means the force of air resistance is exactly equal to the force of gravity, but in opposite direction. Since force is proportional to mass, (Newton's second law, F = m * a) the heavier ball will experience a higher force of air resistance because of its greater mass.