A 60-μC Charge Is Held Fixed at the Origin and a −20-μC

question 54

Multiple Choice

A 60-μC charge is held fixed at the origin and a −20-μC charge is held fixed on the x axis at a point x = 1.0 m. If a 10-μC charge is released from rest at a point x = 40 cm, what is its kinetic energy the instant it passes the point x = 70 cm?

• A) 9.8 J
• B) 7.8 J
• C) 8.8 J
• D) 6.9 J
• E) 2.8 J

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