Power Lab - In the power lab, are group thought that Eric would do the most work because he has the most mass and thought that Ashley would do the least work because she had the lowest mass.
Ben Fitzgerald
9/21/09
Mr. Thorndike
Power Lab
Hypothesis:
In the power lab, are group thought that Eric would do the most work because he has the most mass and thought that Ashley would do the least work because she had the lowest mass. We guessed that Ashley would generate the most power because she had to work harder than Eric who we thought would produce the least amount of energy. As we added the books to the current mass of our bodies, it required more work. Machines would be more efficient than humans when it comes to using energy. We guessed that we would have to eat a little amount of food to be able to climb the stairs with books, we guessed that Ashley would need one piece of cereal, I would need a piece of bread and Eric would need a granola bar. These estimations were guess to how well we would do in the power lab exercise.
Procedure:
- Obtain four books from Mr. Thorndike
- Go to the staircase under Mr. Thorndike’s room between the 2nd floor and the 1st floor mezzanine
- Have Ashley run up the stairs without books from the very bottom to the very top
- Record the time of Ashley going up the stairs without books with a stopwatch
- Give Ashley the four books
- Have Ashley run up the stairs with the four books from the very bottom to the very top
- Record the time of Ashley going up the stairs with books with a stopwatch
- Repeat steps 3-7 with Ben
- Repeat steps 3-7 with Eric
- Measure the stairs in meters from the 1st step to the top of the last
- Calculate the power used by each person using the equation Power= Work/Time where Work=Mass x 9.81 (Acceleration of free fall) x Height