Question

any force applied on an object for 1.5 sec its velocity goes 1.5 m/s to 4.5m/s. If it is moved for 2 sec by same force .what is the final velocity?
$v = u + at$
$a =(v - u) \div t$

Answer 1

4.5 m/sec is the final velocity

Answer 2

4.5 m/s is the correct answer because the raised velocity is that