We have the following equation: s = ut + 1 / 2at ^ 2 Clear a for the equation: 1 / 2at ^ 2 = s-ut at ^ 2 = 2s-2ut a = 2s / t ^ 2-2ut / t ^ 2 Rewriting: a = (2s-2ut) / (t ^ 2) Answer: An equation that represents a in terms of other variables is: C. 2s-2ut / t ^ 2