GATE Civil Engineering (CE) 2017 Shift 1 Solved Paper

A particle of mass 2 kg is travelling at a velocity of 1.5 m/s. A force f(t) = 3t² (in N) is applied to it in the direction of motion for a duration of 2 seconds. Where t denotes time in seconds.
The velocity (in m/s up to one decimal place) of the particle immediately after the removal of the force is ________.