Question

a body moving along a straight line at 20 m/s under goes an acceleration of 4 m/s2.after 2 seconds its speed will be:
a) 8 m/s b) 12m/s c) 16m/s d) 28m/s

Answer 1

28 m/s is it's speed

Answer 2

V=u+at
substituting values v=20+(4*2)=28 m/s