A 50g air-track glider is repelled by a post fixed at one end of the track. It i
ID: 1457001 • Letter: A
Question
A 50g air-track glider is repelled by a post fixed at one end of the track. It is hypothesized that the gliders potential energy is U = e/x, where x is the distance from the post and e is an unknown constant. To test this hypothesis, you launch the glider with the same speed at various distances from the post and then use a motion detector to measure its speed when it is 1.0m from the post. Your data are as follows:
A) Does the data support the hypothesis? Compare the shape of an appropriate graph to a theoretical prediction.
B) Find an experimental value for e. Determine the appropriate units.
Initial Distance (cm) Speed at 1.0 m (m/s) 2.00 1.40 4.00 0.98 6.00 0.79 8.00 0.68Explanation / Answer
e is the charge. Precisely the charge of the electron. The charge of the electron is determined by the experiment called Milikians experiment. The charge of electron is 1.6*10-19 C.
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