Experiment 6: Work, Power and Energy Laboratory Report

1806 Words Sep 30th, 2014 8 Pages
Experiment 6: Work, Power and Energy
Laboratory Report

Eljine Jayson Zhang, Shaira Madelene Vinta, Mel Marvin Villarante, Pauline Alyssa Vega,
Camille Elijah Valdez, Nicole Dominique Vasquez

Department of Physical Therapy
College of Rehabilitation Sciences, University of Santo Tomas
España, Manila Philippines

Abstract

This report aims to show how to determine the power output of going up a staircase and going down the same staircase, to determine the change in kinetic and potential energy of an object in free fall, and to demonstrate the conservation of mechanical energy.

1. Introduction

Work, power and energy are always in relation to each other for these three are always present in every motion that occurs. Work
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Figure 2. Experimental set-up in determining the relationship of potential energy and time, kinetic energy and time, and mechanical energy and time of a tossed ball.

To determine the relationship of potential energy and time, kinetic energy and time, and mechanical energy and time, a prediction was made by throwing a ball vertically up from a height of 50 cm. The motion was detected using a motion detector covered by a wire basket to protect it. Once the motion detector began to collect data, the ball was tossed straight up. A Logger Pro was used to graph the potential energy versus time, kinetic energy versus time, and mechanical energy versus time graphs.

4. Results and Discussion

Activity 1: Power

Vertical distance between second floor and third floor = 4.783m

Weight (N)
833N
Work in going up (J)
3984.4 J
Time to go up (s)
12.1 s
Power output in going up (W)
329.28 W
Work in going down (J)
3984.4 J
Time to go down (s)
9.6 s
Power output in going down
415.03 W
Table 1. Experiment results of group member 1.

Weight (N)
666N
Work in going up (J)
3185.48 J
Time to go up (s)
10.710 s
Power output in going up (W)
2976.21 W
Work in going down (J)
3185.48 J
Time to go down (s)
10.343 s
Power output in going down
309.27 W
Table 2. Experiment results of group member 2.

Weight (N)
500N
Work in going up (J)
2391.5 J
Time to go up (s)
10.3 s
Power output in going up (W)
232.18 W
Work

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