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Problem 20.9-Enhanced- with Feedback C) 20110 (> Part A What is the magnitude of the electric force on one of the masses? Two 4.0 kg masses are 4.0 m apart on a frictionless table. Each has 1.0 μC of charge. You may want to review (Pages 642-644) 0図?
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this question requires knowledge of both newtons law and Coulombs law. Coulombs law provides the force between the charges and newtons law relates the force to magnitude of acceleration.

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Since the two charges are positive in nature so they will repel away each other and they will move away.So the acceleration would be in the direction in which the two masses will move away.

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