Respuesta :

Onoriodefelix

Answer:

71.43m/s

Explanation:

F = m(v - u) /t

Give mass m = 70kg

Force f = 1000N

Time t = 5 secs

Change in velocity (v-u) =?

Using the above formula

1000 = 70( v - u) / 5

Cross multiply

1000 x 5 = 70(v - u)

Divide both sides by 70

5000/70 = 70(v - u) /70

71.43 = v-u

v-u = 71.43m/s