If initial vel. is ‘a’ and accelrn. is ‘a’

then after time t,

v = a + a * t

After time t1 after t,

v2 = v + a*t1

i.e. v2 = a + a*t + a*t1 = a (1 + t + t1)

v3 = v2 + a*t2 = a(1 + t + t1 + t2)

How come the factor of 0.89 and why v2, v3 are calculated differently? What have I missed?

Thanks.