* 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 Conversion. Speed is defined as the rate of change in position, expressed as distance traveled per unit of time. It is a scalar quantity with dimensions distance/time. Velocity is a vector quantity, the rate at which an object changes it's position. Speed unit in SI system is meters per second (mps).