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Energy in a Falling Mass on a Spring

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Physics Coursework Sensing Coursework Aim: The aim of the experiment is to design a temperature measuring device, using a Wheatstone Bridge, with two fixed resistors of 47 ohms and then to implement it. The idea is to end up with a comprehensive set of results which allows us to work out an average, and then plot graphs to show the different variables. Preliminary work: Before I started the actual experiment, I did some preliminary work to find out the best set up for the apparatus I was using. It was also to test out the different apparatus that was available to me and to build a circuit which was set up to do the task which was required. Preliminary Diagram: The apparatus was set up as shown below: Preliminary Method: The apparatus was set up as shows above, and then filled the beaker to half full with iced water. I then put the thermometer in the water and added more ice until the water temperature reached zero. ...read more.


It also gave me time to do more repeats. Safety: Safety is an important factor to consider while doing this, and any other experiment. As we are using Bunsen Burners, heat proof mats will be used, as will safety goggles. The electrical apparatus will be kept well away from the flame. Gloves much be worn when handling the beaker when it is hot to avoid burns. Also books will not be kept on the benches where apparatus is set up, and loose clothing/hair will be tied back. A sensible approach will be taken and behaviour will be in line with the lab rules laid down by the college. Background Physics/Own knowledge: Wheatstone Bridge: This circuit enables resistance to be measured more accurately than by the digital ammeter. It does not rely on the accuracy of instruments, but resistors of a fixed known resistance have to be used. The four resisters used are called P, Q, R, & S. The ratio between these resisters is: P R Q S The resistance to be found is P. ...read more.


This can be clearly seen on the graph, which has an exponential shape. I have no anomalies in my average resistance, as the line of best-fit on the graph passes through all the error bars. I think that overall the experiment was conducted and executed well with no apparent disastrous inconveniences. There was however, a very small problem, which I encountered during the course of the experiment. The original thermistor that I began to use for my preliminary experiment decided to cease to function. This resulted in a loss of time, as I had to repeat my preliminary experiment so that any results conducted were not fair. Conclusion: The displacement increases and the velocity increases then decreases. The same happens with time and height. Displacement increases and the total energy decreases minimally as the energy is transferred to heat while the elastic potential energy increases and the gravitational potential energy decreases. Kinetic energy rises and falls as the spring is dropped and gathers speed before the spring takes the tension and slows it down. I conclude that energy cannot be lost, only transferred from one form to another, and this experiment proves it. ?? ?? ?? ?? ...read more.

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