The purpose of this lab was to get physic students some needed sunshine. So we went out side to calculate the amount of work we use to walk up a flight of stairs and how much work we use to pull an object up the same distance. We will also calculate the power as well.
Experiment:
First thing we did in this lab is measure the height of one step. Then we counted the number of steps total. With the height of the steps and the number of steps we could calculate the height we would travel up the stairs.Then we had to walk up the stairs and time how long it took us to reach the top of the stairs. That was the first part of our experiment for data for work it will take to climb the stairs. Then the next part of the lab we bags with weights in them which we would hang on a pulley over a railing. One of our team members would time the other while they pull the bag up the same height as the stairs.
Here is a picture of the class out side performing collecting data for our experiments.
After all the data was collected when went back inside to calculate our results. First thing we did was take our known weight and convert it into kg. My weight converted into kg was 95kg. Then with this I plugged in the data to the formula for work which is work = force * distance. This formula will give the results for the bad and walking up the stairs.
4.29 m is the distance to the top of the balcony floor in the picture.
Stairs:
Work:
(95kg) (9,8m/s^2)(4.29m) = 3993.99 joules
Power:
work / 8.48 second = 251.19 watts
Bag on pulley:
(5kg)(9,8m/s^2)(4.29m) = 210.21 joules
Power:
work / 8.48 seconds = 24.78 watts
The amount of work or power to bring a bag up the stairs would be much easier using the pulley system, To burn calories the stairs is a better choice.
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