(A) : Two particles of same charge projected with different velocity normal to electric field experience same force
(R) : A charged particle experiences force, independent of velocity in electric field

Given data:  The same force is experienced by two particles of the same charge projected at different velocities relative to the electric field.

In an electric field, a charged particle experiences force regardless of its velocity.

Formula  used: electric force = $q\times E$ , where q is charge and E=electric field .

Detailed solution:

As per formula , In an electric field, a charged particle experiences force regardless of its velocity. Consequently, the force between two particles with the same charge projected at different velocities relative to the electric field is the same.