Experiment 4: Work, Power and Energy
Arlie Bamiano, Jealine Marie Bernabe, Petrenne Clarice Caimbon, Jhia Caso
Department of Biological Sciences
College of Science, University of Santo Tomas
España, Manila Philippines
Abstract
The experiment deals primarily with computing the work done by gravity on each member in two scenarios (going up and down the stairs of the second floor and the third floor of the Main Building) wherein weight was also considered and following this, the power output of each member was also computed. Using the Logger Pro, the kinetic and potential energies of a ball in free fall were graphed and compared. At the end of the experiment, it was said that member #2 was the most “powerful” among the group
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The time it took for the members to go down the stairs from the third floor to the fourth floor was also noted. Next, the members had to devise a way to determine the vertical distance (h) between the third floor and the second floor. This was done with the use of a meter stick wherein the height of each step was noted and added altogether. Next, the work done by gravity on each member when going up and down the stairs was computed as well. Lastly, the power output of each group member was computed as well and the most “powerful” member of the group was determined.
Activity 2 ( Energy of a Tossed Ball: Physics with Computers) weighing the rubber ball that was to be used. Then, the members predicted the graphs for the potential energy versus time of a ball thrown vertically up from a height of 50 cm., graph of kinetic energy versus time of the same ball, graph of total mechanical energy versus time of the same ball. The members then placed the motion detector protected with a wire basket on the floor. The file “16 Energy of Tossed Ball” was opened and a member held the ball directly above and 50.0 cm from the motion detector while another member tossed the ball straight up while the motion detector began to collect data. The graphs obtained using Logger Pro were then compared to the predicted graphs.
4. Results and Discussion Table 1: Activity 1 (Power) vertical distance between second floor and third floor: 5.021 m Member |
Moving along, to the second experiment, “How does force affect your game?” concludes that using a 10 pound ball applying strong force provides a velocity (m/s) of 3.2, a result of 25 (J) for the kinetic energy, and 5 bowling points
The purpose for the students of the Energy of a Tossed Ball Lab involved learning how to measure the change in kinetic and potential energies as a ball moves in free fall. Since there is no frictional forces working on the ball the total energy will remain constant and the students will see how the total energy of the ball changes during free fall.
1) Once the simulation opens, click on ‘Show Both’ for Velocity and Acceleration at the top of the page. Now click and drag the red ball around the screen. Make 3 observations about the blue and green arrows (also called vectors) as you drag the ball around.
To suggest the reasoning behind Whitman's valorization of motherhood one does not have to look further than his own biography. Some Whitman critics such as Sherry Ceniza call his mother, Louisa Van Velsor, his "strongest influence" and the reason that he had such strong admiration for women (). Similarly, Vivian Pollak has noted that for Whitman his own mother was the ideal women (). I further this idea to say that from his admiration for his own mother grew his admiration and idealization of women as mothers. Whitman grew up in a household with six siblings, two sisters and four brothers.
The task that will be performed in the lab is a football snap toward a target. The subject will face way from the target, place their feet about shoulder length apart, place the ball between their feet, bend over and snap the ball through their legs to hit the target. For the experiment, the target is a wall. The wall is marked in increments of 20cm; a center space with five spaces above and below.
In this experiment we first tried to find an experimental value for g. This was done by dropping a golf ball below a sensor that would read and chart the position vs time graph and the velocity vs time graph. From this we could receive an equation and numbers that are useful in finding the velocity and acceleration of the ball in order to find the experimental g value. Then we did another experiment in which we would hold out a ruler between another person's index finger and thumb and then drop it, measuring how many centimeters it took for them to catch the ruler. Using this and an equation we could measure their reaction time.
A 15 kg uniform disk of radius R = 0.25 m has a string wrapped around it, and a m = 3 kg weight is hanging on the string. The system of the weight and disk is released from rest.
Are forth step was the basketball to be hit by the tennis ball and fall through a hoop. This step had potential and kinetic energy and force. The tennis ball used the force from the baseball to hit the basketball. The basketball was storing up potential energy while the rest of the machine was running. When the tennis ball hit the basketball the potential energy was released. As the basketball was falling through the hoop it had kinetic energy.
One part of the experiment was to test four different object free falling from the same height and recording their time with a stopwatch and again with a photogate. The second part of the experiment was to the take one of the four object that had a acceleration nar 9.8 meter/second sq. and testing it 15 more time with different height. Material Needed Stopwatch, meter stick, photogate, pen, ball, water bottle, pill bottle, and ring stand.
As a species we’ve always looked for ways to be faster, stronger, smarter, and live longer. Many enhancements we take for granted today; blood transfusions, vaccinations, and birth control, seemed unnatural or immoral when first introduced. Yet over time we’ve become accustomed to these controls over our minds and bodies, and have used them to better ourselves and our world. Imagine a society without disease, cancers, or heredity disorders. Life span would increase and IQ raised. Mental illness eliminated. Alzheimer’s gone. Hereditary problems, like baldness eradicated. Technology exists to diagnose flawed DNA in pre-implantation embryos, empowering humans to create a stronger, healthier child. Scientists place a new/modified gene into a
The purpose of this experiment is to see how height affects distance and to see how adding additional height affects the distance that the ball travels. Also, to see how gravity pulls the ball down storing energy and releasing the energy as the ball hits the bottom of the ramp and to see the distance the ball travels after books are added.
This soccer science fair project serves to acquaint students with basic information on how the amount of air in a soccer ball can affect the distance it travels when kicked with a consistent force. The greater the air pressure in the ball, the farther it will travel when a force is applied. In the process of conducting the research, the student will learn that atmospheric pressure may also affect how far the ball will travel. The student will learn about the relationship between air pressure and friction: the lower the friction, the farther the ball will go. The student will learn about concepts like air pressure, gravitational force, compression and expansion of air molecules, potential energy and kinetic energy. This science fair experiment
In the 1970’s, China introduced several plans to reduce the country's birth rate and slow the population growth rate. The most prominent plan was the “one child policy.” The “one child policy,” established in 1979, meant that each couple in China was allowed to have only one child. The policy made sure that China was able to support their large population with resources such as education, housing, food, jobs, and healthcare.
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There are many forms of energy. The types of energy that can affect the toy car are potential energy, kinetic energy, and work of friction. Potential is the energy of an object due to its position. Kinetic energy is the energy due to motion. Friction plays a part because it shows how much energy is needed for the car to move. All these energies are intertwined in the toy car.