A 30 g aluminum foil ball with a charge of 40a x 10-9c is, Ask an Expert

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A 3.0 g aluminum foil ball with a charge of +4.0A x 10^-9C is suspended on a string in a uniform horizontal E? field. The string makes an angle of 30 degrees with the vertical.

If the string is cut, how long will it take the ball to fall to the floor 2.7 m below the level of the ball?

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