Figure shows three arrangements of electric field lines. In each arrangement, a proton is released from rest at point $\mathrm{P} and then accelerated through point \mathrm{Q} by the electric field. Points \mathrm{P} and \mathrm{Q} have equal separations in the three arrangements. If p_1 p_2 and p_3 are linear momentum of the proton at point \mathrm{Q}$ in the three arrangement respectively, then