Question 1168661
s=ut+(1/2)at^2
2(s-ut)=at^2
a=2(s-ut)/t^2. This may be written in other ways.

the units are:
m=(m/sec)*sec + a* sec^2
a has to be m/sec^2

m/sec^2=(m-m/sec*sec)/sec^2=m/sec^2