lab 10- Work and power

Purpose:

Determine the output power of human beings to understand the calculation for work and power.

Introduction:

Power is the rate at which work is done. To calculate the average power, we need to get the work and the time. First of all, we should lift a known mass up by a measured distance. By getting timed, we can derive the power. Then walk up the floor and get timed. We can derive the second power by using those data. Run up the floor and get timed to derive the third power.

Calculation:

As plotted.

Conclusion:

a) in your analysis we neglected KE in calculating the total work you did. Make a reasonable estimate of how big of an error this introduces into results.

b) A microwave on oven typically has a power consumption of appoximarly 1100W. How many of the flights of stair we used in this lab would you have to climb each second to equal the power output?

P=111.78w n=1100/111.78=9.84

c) W=1100*360=396000 J

d) (1) P=W/t=20833.33 watts

(2) n=P/P0=208 people

(3) W/P0=t=125000 s

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