provided the date below for seconds

Purpose: To calculate the amount of work done and power generated in climbing a flight of stairs.

Materials: stopwatch, meter stick

Formulas: Work = Force * distance Power = Work / time

1 lb = 4.45 N 1 horsepower = 746 Watts

Directions:

1. Perform the following measurements. Be as accurate as possible.
   1. Convert your weight from pounds to Newtons & record it below.
   2. Measure the height of the staircase & record it below.
2. Time yourself or have someone time you as you ascend the stairs (a full floor). You may run, jog, or walk up.
3. Calculate your work done and your power output in Watts and horsepower.

Your weight/force due to gravity (N): ___979N_____________

Height of staircase (m): 4.2m______.175m *24 steps___________

	Time (s)	Work (J)	Power (W)	Power (hp)
Trial #1	5.53s
Trial #2	5.00s
Trial #3	4.88s
Averages for each	5.14s

Questions:

1) A) Did you walk, jog, or run up the steps?

B) Does your choice affect the amount of work that was required to climb the stairs? Explain. .

C) Does your choice affect your power output? Explain

2) In order to exert exactly 1.00 horsepower, in how much time would you have to ascend the steps? Could you do it?

3) If 1 Calorie = 4186 Joules, how many Calories did you burn climbing one flight of stairs? (Assume your body is 100% efficient.)

1. In reality your body is only about 25% efficient while climbing stairs. So how many Calories did you really burned while climbing one flight of stairs?

1. A regular Oreo cookie is 53 Calories. How many flights of stairs would you have to climb to burn off one Oreo (assuming your body is 25% efficient)?