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Most Recent Video - 2020.02.16
Balloon Excess Charges Experiment (16:21)
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Two 0.0018 kg balloons each have approximately equal magnitude excess charges and hang as shown. If θ = 21° and L = 0.39 m, what is the average number of excess charges on each balloon?
This is an AP Physics 1/JEE/NEET Topic. Content Times: 0:01 The demonstration! 0:58 Translating the problem 1:40 Drawing the Free Body Diagram 2:28 Determining the signs of the charges 3:24 Breaking the force of tension into components 4:38 Summing the forces in the y-direction 5:59 Summing the forces in the x-direction 7:27 Determining “r” and solving the problem 8:49 Why one significant digit? 10:24 Is force of gravity between balloons negligible? 13:34 Actually finishing the problem 15:24 Symmetry / Why equal mass balloons? |
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