D.2-AS formulae supplied in Papers 1, 2 and 4

Select and apply supplied AS formulae for uniformly accelerated motion, hydrostatic pressure, upthrust, sound-wave Doppler effect, electric current and resistor combinations where relevant.

Use d.2-as formulae supplied in papers 1, 2 and 4 to connect the rule to the data and decision in the question.

This matters because d.2-as formulae supplied in papers 1, 2 and 4 determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply d.2-as formulae supplied in papers 1, 2 and 4 to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: use the formula and units given in the question, show the substitution and interpret the result; the calculation alone is not the conclusion.