"Describe an experiment that could be carried out in order to measure the terminal velocity of an object falling under gravity. Include any equations you would use or calculations you would make." The only formula I can think of is F=ma, but I don't see how that is relevent. My train of thought is currently that velocity is d/t. Therefore, I'd have thought that I would need to know the distance from which terminal velocity starts to when it hits the floor, and also the time spent in terminal velocity. But in order to find this I'd need to know how long it takes for drag to be in equilibrium with the weight, how long the object is falling, the distance from rest to the floor, the distance traveled before reaching terminal velocity and the weight. I have been ill for a while and missed the lesson on terminal velocity. Yes, I did it at GCSE, but I never had to calculate terminal velocity so I'm at a complete loss.