Force on charges = Bqv. It is quite obvious that charges are tiny dots (point charge) .

Force on current = BIL . The wire is straight. The two formulas are the same as I=Q/t , then L/t is v.

Force on charge, F= qE.

If E=V/d (uniform) or E=kQ/r2 (point charge),

the force F=qV/or F= kqQ/r2

Force on mass F = mg.

If g = go (uniform = 9.81ms-2 ) or g=GM/r2(point mass) ,

the force F = mgo or F = GmM/r2