physics lab formal lab report

# Conclusion even though the known constant for gravity

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Conclusion:

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Even though the known constant for gravity is 9.80m/s 2 in this experiment the obtained values differed from this. This could very well be due to human error along with other factors such as friction being present on the air track. Friction would distort the obtained results by causing the values of the calculated gravities to be smaller than the known gravitational constant. This is because friction would cause the velocity of the cart to be slower thereby affecting the final result when using equation 1. However, even though the obtained gravitational constants for each part of the lab were not a specific match to the known constant they were still close enough in value to prove that no matter the situation gravity is a constant force. For the walking motion part of the experiment inaccuracies could be due to the equipment itself. For the sonic range finder the farther away a person moved from it the less accurate it became at recording the data, therefore producing a velocity versus time graph that was bumpy. This also means that the accuracy of the sonic range finder is not the same for short distances as it for further distance. However, the sonic range finder becomes inaccurate if one stands closer than 0.5 meters. Therefore, in order to acquire better data for the future one should try to stand as close to the 0.5 meter threshold as possible and when the data is being collected when the person is walking away, one should try to not walk out of the range of the motion detector. For the purposes of this experiment the obtained data was accurate and in conclusion the start acceleration and the stop acceleration were not done at the same rate. Specific techniques such as a one photogate method, a two photogate method, the inclining of a plane, the acceleration due to horizontal force, and the determination of walking speed and acceleration through the use of velocity versus time graphs were used within this lab. Each of the above techniques utilized the fundamental concept of one dimensional motion, which
is the motion of a body in one particular plane. One dimensional motion is a major part of Newton’s classical mechanics, which are applied throughout all levels of physics. References: Clark, Russell J. Introduction to Laboratory Physics 2nd Edition. Dubuque, Iowa: Kendall/Hunt Publishing, 2010. Dictionary.com . Dictionary.com, n.d. Web. 18 Mar. 2013.
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