2 Add A Weight To The Spring example essay topic
395 words
OBJECT: The objective of this lab is to obtain the spring constant by using the simple harmonic motion of the spring-mass system. Once the spring constant is obtained it is to be compared to the spring constant obtained by Hookes Law. PROCEDURE: 1) Using a meter stick measure the distance from the attached point of the spring to the end of the spring, at this time there is to be no mass on the spring. Once this measurement is obtained the elongations can be calculated by subtracting the new measurements from this first measurement. 2) Add a weight to the spring and record the distance.
The new distance is to be subtracted from the first distance. 3) Using the same weight pull the mass down an additional 20 cm. Once the spring is elongated it is to be let go. When the spring is released from its elongated position the stopwatch is started. Once the spring has returned to its original starting position 25 times the timer is to be stopped and the time is recorded. Once two times are taken for every weight increment they are to be averaged together.
4) Steps 2 and 3 are to be repeated eight times using a new weight each time. 5) When all eight trials are done the spring is to be weighed and recorded. Once such reason is that the instrument used are not precision instruments. For instance if the meter stick wasnt perfectly level a measurement which is not accurate would be used in calculating the Theoretical Value of k. If the stopwatch wasnt used properly or stopped or started according to the procedures the time used will directly affect the result of the Experimental Value for k thus creating an inaccurate value for k.
The previous mentioned sources of error can to a certain extent be controlled. However, those sources of error that cannot be controlled are having no friction and having zero air resistance. CONCLUSION Considering all the possible sources of error, this lab proved to be rather successful. It is apparent with reference to the relatively low Actual Error of 6.25%. In having such a low error this concludes that one can find the spring constant either dynamically or with Hookes Law.
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