Explanation:

u=50m/s

v=0

t=5sec

Now,

a=v-u/t

=0-50/5

-10m/sec^2

A/Q

F=ma

2000=m×-10

2000/-10=m

-200=m

mass=-200 kg

initial momentum=mass× velocity

-200×50

=-10000

initial momentum =-10000

Answer:

Bhaiya ji pranam ...

pehchana meko xD ?