* A lumen is the same as Lux and is what many modern light meters will calculate their measurement in. The next step is to calculate the number of watts. One lumen is = 0.001496 watts. This is pretty simple, after you have your total number of lumens from step 2.
Quick Answer. The formula for speed is s = d/t, where s equals the speed, d is the distance covered and t is the time it took to cover the distance. The formula for finding the instantaneous speed at a specific point is found by taking the derivative of the speed equation. Continue Reading.
Speed and velocity are both time rate of change of position and have the same dimensions: L/T (where L and T are length and time). Their units in the metric system are meters per second or m/s. Acceleration is rate of change of velocity and so its dimensions are [math]\frac{L}{{T}^{2}}[/math].