The object is moving in a straight line with uniform acceleration, the acceleration is 4m / S2, and the displacement is 12m within 2S

The object is moving in a straight line with uniform acceleration, the acceleration is 4m / S2, and the displacement is 12m within 2S

S=V0T+1/2AT^2
V0=0.5AT-S/T=0.5*4*2-12/2=-2m/s
The initial velocity is - 2m / s
The initial velocity is 2m / s and the direction is opposite to the acceleration direction