# Power

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Colegio Catolico Notre Dame
Caguas, P.R

Lab # 5: Power

Tristian Perez Rivera
11-136
Mrs. Martinez
Physics Lab
Partners
* Physics Classroom

Objective
* To determine the workand power as you climb stairs.

Materials
* Each lab group will need a meter stick, a stopwatch, and a climber.
Data
Data Table:
Student | Time Recordings(s) | Time Average(s) | Weight (L) |Tristian | 4.30, 4.28, 4.38 | 4.32 | 134 |
Jose C. | 3.68, 3.97, 3.65 | 3.77 | 150 |
Astro | 3.75, 3.88, 3.75 | 3.79 | 125 |
Angel | 4.28, 4.31, 4.06 | 4.22 | 112 |
Jose M. | 3.39, 3.06,2.78 | 3.08 | 175 |
Luis | 3.35, 3.06, 3.30 | 3.24 | 140 |
Alberto | 3.50, 3.15, 3.13 | 3.26 | 148 |
Ivan | 3.16, 3.19, 3.03 | 3.13 | 151 |
David | 4.97, 4.59, 4.82 | 4.79 | 137 |
Gilberto |5.72, 5.53, 5.40 | 5.55 | 132 |

Height: 3.94m

Calculations
Work
Tristian: W= (150L) (0.45kg/1L) (9.81ms2 ) (3.94m) = 2.33 x 103 J
Student | Work(J) |
Jose C. | 2.61 x 103|
Astro | 2.17 x 103 |
Angel | 1.95 x 103 |
Jose M. | 3.04 x 103 |
Luis | 2.44 x 103 |
Alberto | 2.57 x 103 |
Ivan | 2.63 x 103 |
David | 2.38 x 103 |
Gilberto | 2.30 x 103 |Power
P=W/t
Tristian: P= 2.33 x 103 J / 4.32s = 539W
Student | Power(W) |
Jose C. | 692 |
Astro | 573 |
Angel | 462 |
Jose M. | 987 |
Luis | 753 |
Alberto | 788 |
Ivan | 840 |
David| 496 |
Gilberto | 414 |

Observations
* We used three stopwatches to minimize the percent error of each climber.
* When we were climbing the stairs, they were wet and slippery, sometripped at times.
* There was a lot of percent error when we measured the string used to determine the height of the stairs.
* Another source of error could have been rounding the numbers whencalculating work and power.
* The ones with less mass had less work and the ones with more mass had more work.
* Also the ones with more work and less time were the ones who got more power....