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I was performing some experiments about impulse and conservation of mechanical energy, and for that I was looking to good ways of measuring the velocity of a sphere under the action of a force. In free fall, having the height H it was falling along, I have used the formula v = (2gH)¹/². I'd like to know if there are more practical (experimental) way of measuring velocity of if I have to recur to indirect, mathematical ways each time.

Thank you!

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# I Measuring Velocity

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