what change in velocity would be produced on a body of mass 4kg, if a contact force of 16N act on it for 2sec.

Answer 1

II Newton's law:
a=F/m
a=16N/4kg
a=4m/s^2

a=Δv/Δt
Δv=a x Δt
Δv=4m/s^2 x 2s
Δv=8m/s
change in velocity is 8m/s