Question

a body is moving along a straight line at 20ms -1 undergoes an acceleration of 4 MS -2. after 2 s, its speed will be:​

Answer 1

Answer:

v=20m/s

a=4m/s^2

t=2s

a=(v^1-v^2)/t

4=20-v^2/2

8-20=v^2

v^2=12m/s

hope it will help you...