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Two small plastic balls hang from threads of negligible
Chapter 19, Problem 94GP(choose chapter or problem)
Two small plastic balls hang from threads of negligible mass. Each ball has a mass of 0.14 g and a charge of magnitude q. The balls are attracted to each other, and the threads attached to the balls make an angle of \(20.0^{\circ}\) with the vertical, as shown in Figure 19–39. Find
(a) the magnitude of the electric force acting on each ball,
(b) the tension in each of the threads, and
(c) the magnitude of the charge on the balls.
Equation Transcription:
Text Transcription:
20.0^\circ
Questions & Answers
QUESTION:
Two small plastic balls hang from threads of negligible mass. Each ball has a mass of 0.14 g and a charge of magnitude q. The balls are attracted to each other, and the threads attached to the balls make an angle of \(20.0^{\circ}\) with the vertical, as shown in Figure 19–39. Find
(a) the magnitude of the electric force acting on each ball,
(b) the tension in each of the threads, and
(c) the magnitude of the charge on the balls.
Equation Transcription:
Text Transcription:
20.0^\circ
ANSWER:Solution 94GP
Step 1 of 4
(a)
Here we need to find the magnitude of electric force acting on each ball.
Let T be the tension, be the weight of ball and
be the electrostatic force.
By considering the left ball, using Newton’s law we have
- Horizontal components,
……..1
- Vertical components,
…....2
Solving for T,
……..3