For each case, say which equation you would use.

Step 1. (a) $v = u + at$.

Step 2. (b) $v^2 = u^2 + 2as$ (no $t$).

Step 3. (c) $s = ut + \tfrac12 at^2$ (no $v$).

Step 4. (d) $v^2 = u^2 + 2as$, written as $a = \dfrac{v^2 - u^2}{2s}$.

Step 5. (e) $s = \tfrac12(u + v)t$, the area of the trapezium.