Problem 11-71 Grav & Elec Potential - Opposite Direction

A particular proton in space is subjected to two fields: a gravitational field ($1.30 \times 10^5\; N/kg$  toward planet $X$), and an electric field ($2.47 \times 10^{-4} \; N/C$ away from planet $X$).

(a) If the proton is released from rest, in which direction will it move?
(b) After moving $1.50 \;m$, what will be its speed? Use energy methods and assume uniform fields.

No. The direction of an electric field is defined as the direction of the force on a POSITIVE charge in the field.

Try again.