Another theoretical one

Change in momentum is equal to force times change in time:

$\Delta p = F\cdot\Delta t = 100 \text{ N} \cdot 1 \text{ s} = \boxed{100} \text{ kg}\cdot\text{m/s}$

Impulsive force(I)=f x t, where, f=force applied and t=Time

We can write f x t as ma x t, where m=mass, a=acceleration, t=time

a x t =>v-u, where v-u is change in velocity

=>I=m(v-u) which gives the change in momentum i.e linear momentum

therefore change in linear momentum=100 x 1=100