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

F = ma, and in this case acceleration is 9.8 m/s (gravity) for both balls; for mass, the iron ball is heavier; these two facts combined with the equation mean that the iron ball experiences a larger downward force; and at terminal velocity we know that the ball moves at constant speed (no acceleration), meaning that the net force on the balls are zero, or all forces cancel out, or more specifically the downward force from gravity cancels out the upward force from air resistance. We know the iron ball has a larger downward force, therefore it has a larger upward force (air resistance).