Analysis of Work, Energy and Power Experiment Essays

Analysis of Work, Energy and Power Experiment Essays Analysis of Work, Energy and Power Experiment Essay Analysis of Work, Energy and Power Experiment Essay Analysis of Data In the first part of the experiment, we use a fan cart and first thing we do it to get the force of the fan cart by tying a string in the fan cart and hang a mass until the system is not moving that means that it is in equilibrium state. The tension in the string is equal so that the hanging mass multiplied by the gravitational pull of the earth which is 9. 8 ms2 is equal to the force exerted by the fan cart. Then we remove the string and turn on the fan cart and then let it move and record the time when it passes the certain distance in the track. We can say that the time that’s being recorded for the four trials is directly proportional to the distance or displacement that being covered by the cart, as the displacement increases the time also increases, and we can also say that the velocity is constant because the fan cart gives off a constant force. The result that we got for work in the four trials is increasing from the first trial to the last trial because we increases the distance it covers and the work is the product of the force and the distance covered by the object. And the power is the rate at which the work is done it is the work done per unit of time which is second. We got the values of power by dividing the work by the time we got in the smart timer reading. And in table 2, we measure the length of the string and the initial height which is the distance of the mass in the table which serve as our reference line. And the using the spring balance we lift the mass in different angles, in trial 1 we use 30Â °, second trial we use 60Â °, third trial 45Â ° and the fourth trial we use 90Â °. As we lift the mass we measure the distance of the mass from our reference line and the horizontal distance of it from its original position and also we record the reading of the force in the spring balance. From those values we compute for the work and the gravitational potential energy of that table. For the work done we use the formula w=mg L 1-cos? and for the gravitational potential energy we use the formula PEg=mg(hf-h0). We must derive the same result with the work done and the gravitational potential energy or close to that because L 1-cos? s equals to hf-h0. There are hundredths discrepancies on the result maybe because of our measurement in the height but we can say that it is also close to each other. Conclusion In this experiment I learn that the greater the displacement the greater the work done with a constant force acting on the system. And also I learn that the work done is equal to the gravitational potential energy. Work, power and energy vary directly to the displa cement or change in height. There is no work done, power and energy when there is no displacement occurs in the system. Energy is just changing from one form to another and it is neither be destroyed nor created. It is the ability of an object to do work and the rate of work with respect to time is called power. And work is just the product of the force and the displacement. The can be positive, negative and even zero depending on the angles between the force acting on it and the displacement done by the object. The gravitational potential energy is the energy stored within an object due to its height above the surface of the earth. To lift a certain object upward, the work must be done against the downward pull of the earth. And it also varies directly to the weight of an object that being lifted, the heavier the object is the higher work or energy is needed to lift it upward. One of the best examples of work, energy and power is when you are walking at a certain displacement, even you are just walking you’re already doing work the force is your weight and multiplied it to the displacement you covered from walking you already compute the work you’ve done and the power is basically the work over the time you covered from walking, the power is the rate of the work you’ve done and the energy is capacity for doing that work which is walking.

Venezula essays

Venezula essays The history of Venezuela has been a long and often turbulent one. It is filled with exploration, religion, and shifts of government. But, the movement from dictatorship to democracy is the most significant. The move from dictatorship to democracy is the most significant point in Venezuelas history because of the peoples extreme opposition of the dictators, the time period when the first election of a democratic president, and the election of Romulo Betancourt. If the people of a country are opposed to the government, it will not be successful. A main reason why dictatorship didnt work was because of the peoples hate of the form of government and the dictators that run it. Between 1908 and 1935, General Juan Gomez ruled by repression and terror. The government had been a dictatorship since the 19th century (Gomez died in 1935. Venezuelans danced in the streets when they heard of his death. Johan Kohen Winter, 24). Nineteen thirty-six through 1948 marked the first time the country of Venezuela was ruled democratically. These years were times of political unrest. Then from 1950 to 1958 another dictator, General Marcos Perez Jimenez, came into power. His term is remembered by corruption and brutal suppression of the opposition as well as taking a step back in the progress toward democracy. This is great because it marked the first time that the people began to organize to oppose and try to change the government (For the first time, between the 1930s and 50s the people began to organize themselves into unions and political parties, uniting in opposition to Jimenez. Marion Morrison, 48). The election of Romulo Betancourt was the most important move toward democracy. This set the stage for democratic presidents as well as the countries first major political party, Accion Democratica. This party, along with the Christian Democratic ...

Renting an apartment is a better option than buying a house Essay - 3

Renting an apartment is a better option than buying a house - Essay Example There is also the freedom of being able to do whatever one wants with the house, for instance, remodeling, redecoration or making any improvement as he/she wants. Moreover, no one gives the buyer any restrictions (Mortgagecalculator.org, 2011, para1). Buying a house comes with many advantages. To start with, the buyer has tax advantages over the rental apartments. This is so because the interests and taxes can be itemized for deductions of tax. The cost off renting a house can be substantial than the cost of buying one. Again, when the buyer has completed mortgage payment, they can achieve a better credit rating (Mortgagecalculator.org, 2011, para4). When buying or renting a house, one should consider two key principal aspects: the practical matter and the heart matters. Matters of the heart vary from one person to another. One will like a house in urban areas while another will like a house in the rural areas, this are heart matters and can influence the decision to rent or buy. However, the objective is answering the question as to why people should buy houses. According to Lotich (2009), when one buys a house, it acts as an automatic savings plan. This can be demonstrated by the example of when a twenty-five old person gets a thirty-year mortgage; hopefully they will have completed the payment at the age of 55. This means that if one had not saved much for the future, their least concern will be the house payment. The benefit that comes with this plan is that over the 30-years the value of the home is likely to appreciate. He further indicates that a home is an investment that one can live on. Even when home value drops, the house will still offer the advantage of being able to reside in it, different from when one invests in stock markets – such benefits will by no means be provided. The house belongs to the buyer and the most exciting thing is that, there is the ability to customize the house, like painting the walls and