Run up a flight of stairs as fast as you can, measure the time it takes and the height of one stair, and count the number of stairs. If you don't know your weight, measure that too. These measurements need not have three significant digits, but the calculated values do. Recall that 1 inch is about 2.54 centimeters, and 2.2 pounds is the weight of about 1 kg of mass. weight = 148.5 pounds time = 1.66 s
Run up a flight of stairs as fast as you can, measure the time it takes and the height of one stair, and count the number of stairs. If you don't know your weight, measure that too. These measurements need not have three significant digits, but the calculated values do. Recall that 1 inch is about 2.54 centimeters, and 2.2 pounds is the weight of about 1 kg of mass.
weight = 148.5 pounds
time = 1.66 s
height of one stair = 18.5 cm, number of stairs = 12
a. What is your power while running up stairs? Include units in your answer.
b. The human body has an efficiency of about 28 percent. If you could maintain this stair-climbing pace around the clock, you could consume how many calories of food energy each day and not gain weight? (1 food calorie = 4186 joules)
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