11-71. A particular proton in space is subjected to two fields: a
gravitational field (1.30X105 N/kg toward planet X),
an electric field (2.47X10-4 N/C away from planet X).
(a) If the proton is released from rest, in which direction will
(b) After moving 1.50 m, what will be its speed? Use energy
and assume uniform fields.
Which are the correct expressions for the
of the two forces, that is, the Electric forceFE and
the gravitational force Fg ?
= mg Fg = qE
FE = qE Fg = mg
= qg Fg = mE