**People Power**

Objective: To calculate power generated by humans.

**Equipment: **stopwatch, stairs** **

**Important: If you have a medical condition that prevents you from
climbing stairs, notify your instructor prior to performing the lab.**

**Methods:**

1. Record your mass in kilograms.

2. The vertical height of the
stairs from the basement to the second floor landing is 7.0 meters.

3. Climb the stairs safely with a
stopwatch, recording your ascent time to the nearest 0.1 second.

**Analysis:**

1. Calculate your weight.

2. Determine the work you did *against
gravity* (i.e., vertically) during the climb.

3. Calculate your power in watts,
then convert to horsepower (1 hp = 746 watts).

4. Using your calculated power,
determine the *vertical component* of your velocity up the stairs. (P=Fv)

5. How long would a 60 watt bulb
have to burn to produce the energy you used climbing the stairs?

6. Assuming 100% of your energy
can be converted to electrical power, and electricity costs $0.10 for one
kilowatt-hour, how high should you climb to make one penny's worth of
electricity? **Show all work &
units.**

7. If one food Calorie (equals 1000
chemistry calories) equals 4184 J, how far up could *you* go on one
cream-filled Oreo cookie containing 50 Calories?

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