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My experiment of the free falling object method to determine the acceleration due to gravity was very simple and straightforward. Therefore I conclude that my experiment to determine the acceleration due to gravity was successful and I have achieved my aim for this experiment. According to the books the value of g is 9.81ms -2 that gives a difference of about 0.0046, to calculate the percentage error it comes to about 0.046%, which states clearly my experiment, is almost as accurate it can be.
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From the results my acceleration due to gravity is about 9.8054 ms -2. Overall the free falling object method was a fair and simple experiment to determine the acceleration due to gravity. Averaging twenty readings to improve accuracy b Y factor of 20 Averaging two readings to remove human error Line eye up with fixed object for timing accuracy. independent) measurements and averaging the systematic uncertainty then decreases with the square root of the number of measurements: making 10 measurements will reduce the statistical uncertainty by a factor of about √ (10) = 3.2 Errors This statistical uncertainty can be reduced by making many individual (i.e. The statistical uncertainty on T comes from the fact that my eye-hand reaction time varies from one trial to the next it fluctuates (around the systematic value). by measurement against a known time interval. The stopwatch systematic uncertainty should be listed by the manufacturer of the instrument, whereas the eye-hand uncertainty has to be estimated by myself, e.g. Uncertainties while measuring the time period T, Systematic errors are introduced if my stopwatch is systematically off by a certain amount, and by delays due to my eye-hand reaction time. The constants π and 2 have no units so have no effect ESTIMATION OF UNCERTAINTIES. It should be observed that the graph of length over time 2 was plotted. The units of acceleration are ms -2 which agrees with the value above. As this is 9.8696 the experiment was remarkably accurate. The gradient was calculated to be ¼ and this was inserted into the above equation to result in g=2 2 π 2 ¼. The line can be sent to go through the origin as expected, it there is a tiny pendulum, it will have a tiny period and if there is an infinitely small pendulum, an infinitely small period. A line of best fit was added to the chart as shown. read more.Īs can be seen the points plot into a straight line. the earth’s gravitational strength is calculated by weight (N) / mass (Kg) as stated above a =F/m therefore the earths gravitational field strength (g). Gravity is the weakest of the four fundamental forces, yet it is the dominant force in the universe for shaping the large-scale structure of galaxies, stars. Mass is measured in Kg (kilograms) and weight is measured in Newton’s. This involves mass, which is the amount of matter an object contains and weight, which is the force of gravity pulling down on an object with a mass. The aim of this investigation is to measure the earth’s gravitational field strength, which is also the acceleration due to gravity. My plan for this investigation is to perform various experiment the determine acceleration due to gravity such as the pendulum, free falling object which is the g apparatus and also by AIM We have been told that the acceleration due to gravity of earth is 9.81 m/s² or g= 9.81 m/s², however, due to myriad of factors, g in one place differs slightly to other, as u increase the altitude the g decreases. The surface of the earth accelerates upwards at the rate of about 10 m/s2 with respect to spacetime.
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Objects accelerate because spacetime moves past them. What is acceleration due to gravity? It is the force or pull of the gravity of the earth according to Newton’s first law a=F/m Also the G apparatus (freely falling mass) can be used to determine the acceleration due to gravity. My investigation is on determining the acceleration due to gravity by using simple pendulum.