A ping-pong ball has been electrostatically charged such, Physics

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A ping-pong ball has been electrostatically charged such

Question

A ping-pong ball has been electrostatically charged such that it has 2.5 x 1015 excess electrons. The ball has a massof 1.0 g. It is observed to float motionless in the presence of auniform electric field. What is the magnitude and direction of this electric field.

Hint: The ping-pong balls weight = mg is adownward force. g is the acceleration due to gravity = 9.8m/s2.

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Physics: A ping-pong ball has been electrostatically charged such

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Physics: A ping-pong ball has been electrostatically charged such

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