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.
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.
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 &
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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