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# Universal Gravitation

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Introduction

Lab 2.4: Universal Gravitation Purpose: The purpose of this lab is to determine the value of the Universal Gravitational constant experimentally. Design: Using an apparatus similar to the one used by Cavendish two fixed masses will be brought close to two mobile masses which are attached to a horizontal rod that is suspended by the torsion wire. The distance between the masses is varied and the angular movement of the mobile masses will be related to the tensional force. ...read more.

Middle

Data: Mobile Mass: 3.125 kg Fixed Mass: 9.588 kg The Force VS the Distance, the Reciprocal of the Distance and the Square Reciprocal of the Distance Force (N) x 10-6 Distance (cm) Reciprocal of Distance (cm) Square Reciprocal of Distance (cm) 19.9850 1.00 1.000 1.000 4.9963 2.00 0.500 0.250 2.2206 3.00 0.333 0.111 1.2491 4.00 0.250 0.063 0.7994 5.00 0.200 0.040 0.5551 6.00 0.167 0.028 0.4079 7.00 0.143 0.020 0.3123 8.00 0.125 0.016 0.2467 9.00 0.111 0.012 0.1999 10.00 0.100 0.010 0.1652 11.00 0.091 0.008 0.1388 ...read more.

Conclusion

Determine the accuracy (percentage difference) of G by comparing it to the theoretical value. Evaluation: There is a 0.00117% error in this lab. This difference could be due to the inaccuracy of the experiment performed and equipment used. Factors such as wind or other objects could have affected the amount of torsion in the wire. There is also the factor of uncertainties by human calculations. However, we were not responsible for the data provided, and as such, cannot assume that these factors were responsible. ?? ?? ?? ?? ...read more.

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