Question: A positively charged particle initially at rest on the ground moves (4.0 mathrm{~m}) upward in (2.00 mathrm{~s}). If the particle has a chargeto-mass ratio of

A positively charged particle initially at rest on the ground moves $4.0 \mathrm{~m}$ upward in $2.00 \mathrm{~s}$. If the particle has a chargeto-mass ratio of $10 \mu \mathrm{C} / \mathrm{g}$ and the electric field in this region is constant and uniform, what is the magnitude and direction of the electric field?

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