Work Power Energy
Experiment 7: Work, Power and Energy
Laboratory Report
John Karl Macrohon
Department of Math and Physics
College of Science, University of Santo Tomas
España, Manila Philippines
Abstract The experiment is subdivided into two activities: Power and Energy of a Tossed Ball (Physics with Computers). The work done by gravity on each member when going up and downstairs of the second and third floors of the Main Building and the power output of each member of the group in each case was computed in activity 1 (Power), while in activity 2 (Energy of a Tossed Ball),a ball was thrown vertically up from a height of 50.0cm from the motion detector to compare the graphs the it collected from the predicted graphs of the group . The results obtained from the experiment clearly demonstrated conservation of mechanical energy, the change in kinetic and potential energies as a ball moves in free fall and the power output when going up and downstairs.
1. Introduction Long ago, people used to trade by only exchanging products when the concept of 'money' was yet to be introduced. Now we do know the concept of money. But if we were to define money, it would not be an easy task. But we do know it can manifest itself in many forms. Money is a concept imagined by man and it plays a very big role in the present world.
The concepts of work, energy and power play the same role in physics. In the physical sciences, work (W) is defined as the product of the magnitude of the force times the distance through which it acts as the object is moved [1]. The SI unit of work is the newton-metre or joule (J). Energy (E) is the ability to do work which has two types: Potential Energy which is the energy due to position and Kinetic Energy which is the energy due to motion. The unit for energy is joule (J). Power (P) is the rate of energy generation (or absorption) over time. The unit of power is the watt (W) which is the . The objectives of the experiment are: To demonstrate
Laboratory Report
John Karl Macrohon
Department of Math and Physics
College of Science, University of Santo Tomas
España, Manila Philippines
Abstract The experiment is subdivided into two activities: Power and Energy of a Tossed Ball (Physics with Computers). The work done by gravity on each member when going up and downstairs of the second and third floors of the Main Building and the power output of each member of the group in each case was computed in activity 1 (Power), while in activity 2 (Energy of a Tossed Ball),a ball was thrown vertically up from a height of 50.0cm from the motion detector to compare the graphs the it collected from the predicted graphs of the group . The results obtained from the experiment clearly demonstrated conservation of mechanical energy, the change in kinetic and potential energies as a ball moves in free fall and the power output when going up and downstairs.
1. Introduction Long ago, people used to trade by only exchanging products when the concept of 'money' was yet to be introduced. Now we do know the concept of money. But if we were to define money, it would not be an easy task. But we do know it can manifest itself in many forms. Money is a concept imagined by man and it plays a very big role in the present world.
The concepts of work, energy and power play the same role in physics. In the physical sciences, work (W) is defined as the product of the magnitude of the force times the distance through which it acts as the object is moved [1]. The SI unit of work is the newton-metre or joule (J). Energy (E) is the ability to do work which has two types: Potential Energy which is the energy due to position and Kinetic Energy which is the energy due to motion. The unit for energy is joule (J). Power (P) is the rate of energy generation (or absorption) over time. The unit of power is the watt (W) which is the . The objectives of the experiment are: To demonstrate