Question

A constant Force if magnitude 20 N acts on a body of mass 2kg, initially at rest for 2 seconds. What will be the velocity of the body after (a) 1 second from start? (b) 3 seconds from start?

Answer 1

a) velocity after 1 second will be 10 mps
b) velocity after 3 second will be 30 mps

Answer 2

F=MA
20N=2a
20/2=a
10m/s^2= a

V=?
U=0 m/s


$v = u + at \\ v = 0 + 10 \times 1 \\ v = 10m {s}^{ - 1}$
$v = u + at \\ v = 0 + 10 \times 3 \\ v = 30m {s}^{ - 1}$