The acceleration is 2.5 meters per second, and the displacement is 10 meters in the last two seconds

The acceleration is 2.5 meters per second, and the displacement is 10 meters in the last two seconds

s=vt2+at2^2/2
2v=10-5=2.5m/s
v=at1
t1=v/a=2.5/2.5=1s
Total time: T = T1 + T2 = 1 + 2 = 3S