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Coulomb’s Law Did everyone read their Book??? Mastering physics registration?. Wimhurst machine. pop-bottle machine demo. blues from Wimhust. Reds from Wimhust. Zap. Zap. Zap. zap. zap. zap. zap. STOP !!. Coulomb’s Law al l’experiment. Make all in the same way.
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Coulomb’s Law Did everyone read their Book??? Mastering physics registration? Wimhurst machine pop-bottle machine demo
blues from Wimhust Reds from Wimhust
Zap Zap
zap STOP !!
Coulomb’s Law al l’experiment Make all in the same way Standard red charges
Experimental results: RED charges (and is repulsive !!) Check: Blue-Blue follows the same rules!
Experiment: Making a standard BLUE charge? adjust Quntil Then the amount of blue charge is the same as the amountQS of red
The semi-final analysis Red or blue types
The final analysis Red or blue types
Conventions: is red kind of charge is blue kind of charge means repulsive means attractive
Unit of charge = Coulomb How much What type (Blue)
Nimitz-class super carrier’s weight? Displacement ≈ 102,000 tons ≈ 9×108 N Force between two 1-C Charges separated by One meter Weight of ten of these aircraft carriers ≈
Lesson: a Coulomb is a lot of charge! How much charge (Q) required to provide F = 1 N at a separation of 1 cm ? Next page!
Number example 1.50 cm Net force on this charge? 2.00 cm
All the forces acting on our charge of interest: C) Net? Add them up 1.50 cm 96 N 204 N