Question

A body moving in a straight line at 72km/h undergoes an acceleration of 42m/s².Find it's speed after 2 seconds.

Answer 1

the speed should be near to 35km/h
may it helps u

Answer 2

a=42 m/s
u=72km/h=20 m/s
t=2s
v=u+at
v=20+42^2
v=20+84
v=104 m/s