A 60- $\mu$ C Charge Is Held Fixed at the Origin and a Origin

question 142

Multiple Choice

A 60- $\mu$ C charge is held fixed at the origin and a -20- $\mu$ C charge is held fixed on the x axis at a point x = 1.0 m.If a 10- $\mu$ C 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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