Question

a force of 15 Newton Act 4 5 second on a body of mass 5 kg which is initially at rest calculate the final velocity of the body

Answer 1

F= ma
a=F/m
a=15/5 = 3 m/S2
v=a*t
v=3*45
v=135 m/s ans

Answer 2

F =m
S =f/m
S = 15/5
45= 3
=45*3
= 135.