Question

heya guys plzz help me.. ❤❤❤
answer these 3 questions..plzzz ....plzz...
plzz solve this in copy step by step.❤❤

Answer 1

force on rocket =
$mv \div t$
where m=mass =0.02kg
v=velocity=500m/s
t=time=1sec
therefore,
force f =.02×500/1
=10N

Answer 2

2. the body remains at rest if the net external force is 0