Horsepower

Recently in a lab in my physics class my teacher made us do a series of measurements to calculate our horsepower. Although this is only mathematically it still seemed to interest me alot so I have decided to show you how to do the same thing. Measure out 10 meters and time how fast you are able to run it (in seconds). You will need someone with you to time it to be accurate. Do this 10 times to get a general measurement and then calculate. First you must weigh yourself on a scale to find your weight once you do that multiply it by 4.45 and then divide it by 9.8 and that will be your mass in kilograms. Once you have that it’s time to find acceleration, which is your distance divided by your time which is then used to find force by multiplying acceleration with your mass. Lastly multiply force and distance and then divide it by time which will equal your power in watts. To get your power in Horsepower just divide watts by 746 and there will be your answer. This my seem confusing but if you take it step by step it shouldn't be difficult.