Speaker one We’ve been using Sir Isaac Newton’s theories for hundreds of years and still use his equations today. Now, how can we test Newton’s second law using equipment found in our laboratory?

The motion of any moving object can be described by its speed– time graph. Data from the graph can be used to calculate acceleration, the distance travelled and the average speed for the motion.

IN a letter to NATURE, dated March 29, I stated that we have “no names for units of velocity, acceleration, impulse, momentum, &c.” This cannot be said now. Through the kindness of Messrs. Macmillan ...