A small particle of mass 1.8 xx 10^(-30)...

A small particle of mass `1.8 xx 10^(-30)` kg and charge `-3.5 xx 10^(-19)` C is dropped in a region of electric field of strength `2.8 xx 10^5 NC^(-1)`, directed in the upward direction. Calculate the time taken by the ball to cover a distance of 2 cm.

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`0.857xx10^(-9)` s

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