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Velocity
0.0 m/s
Drag force
0.0 N
Acceleration
9.81 m/s²
How to use: Set the mass and drag coefficient, then click
Drop. The ball falls through the column on the left. The red arrow
is the weight (constant). The green arrow is drag (grows as it speeds up).
The graph on the right plots velocity against time. Watch what happens
when the two arrows become equal.
Notice: when drag equals weight, the net force is zero — so the acceleration is zero. But the ball doesn't stop — it keeps moving at a constant speed. That's terminal velocity.