Question

What force will change the velocity of a body of mass 1kg from 20 m/s to 30 m/s in two seconds?

Answer 1

so a= (30-20)/2=5 m / sec sq
F=ma
= 1×5=5 newton

pls mark it as brainliest.

Answer 2

I think velocity is increasing by 10 m/s . hence
and mass is 1 kg ..
v=u +at.
v= 30.
u = 20 .
a= ?.
t= 2.
30= 20 +a2 .
30-20=2a.
10=2a.
a=5.
F=m×a.
F= 1 × 5.
F= 5 N.