Question

(only answer if you know the answer or I'll report) Solve it w the steps tysm​

Answer 1

v_f = 20 m / s

Step-by-step explanation:

For this exercise let's use the relationship between momentum and moment

I = Δp

F t = m v_f - m v₀

as the body starts from rest v₀ = 0

F t = m v_f

v_f =
`(F t)/(m)`

let's calculate

v_f = 4 2 / 0.4

v_f = 20 m / s