How to calculate momentum of 2 objects?

Question

a .2 kg cart and a 2 kg cart are pushed iwith equal force forward for 1 second, without friction, over a horizontal surface, starting from rest. After the interaction at t=1 sec compare the momentum of the .2 kg cart and the 2 kg cart

Answer 1

the momentum of the 2kg  cart was obviously much stronger because it weighs more and the weight gave it more velocity

Answer 2

For 0.2 kg cart:                                  

                              

F=ma

  =m(v-u)/t

u=0 , t= 1

F=mv

v=F/m

  =F/0.2

v=5F

P=mv

   =0.2 x 5F

   =F

For 2 kg cart:

F=mv

v=F/2

P=mv

   =2 x F/2

   =F

Both carts have the same momentum