A-Level Physics has a reputation for being “a maths subject with extra steps,” which is only half true. The maths is usually the easy part once a student has it; what actually separates a strong Physics student from a stuck one is a way of approaching a problem that rarely gets taught explicitly.
Habit one: write down what you actually know before reaching for a formula
The instinct under exam pressure is to scan the question for numbers, match them to a formula that uses those letters, and plug them in. This works for the easiest third of a paper and falls apart immediately for anything requiring two steps. The stronger habit is to list every quantity given, including the ones in words rather than numbers (“released from rest” means initial velocity = 0), before touching a formula at all.
Habit two: estimate before you calculate
A genuinely useful Physics habit is a rough mental estimate of the answer’s size and units before working it out properly. If a calculation for the speed of a falling object comes out at 4,000 m/s, something has gone wrong with a unit conversion or a squared term — and spotting that before writing it as a final answer is worth more than most additional practice questions.
Habit three: check the answer against the physical world, not just the algebra
A numerically correct answer can still be physically nonsensical — a negative distance, a probability over 1, a temperature below absolute zero. Students who check “does this make sense as a real thing” rather than just “did I do the algebra right” catch a different category of mistake that pure practice doesn’t train.
Algebra tells you the calculation is correct. Only physics tells you whether the answer could actually happen.
Why these habits are hard to build from a textbook alone
None of these three habits are really “content” — they’re not in a syllabus checklist, and a student can get full marks on a topic test without ever being asked to demonstrate them. They’re built by watching someone else do it, out loud, repeatedly, and then being pushed to do it yourself while someone checks whether you skipped a step. That’s a much more natural fit for a real conversation with a tutor than for another worksheet.
If exam-technique habits like these are the missing piece rather than raw content knowledge, that’s worth saying directly to whoever is helping you revise — it changes what a useful session looks like.
Try it yourself
A ball is dropped from rest and hits the ground after 2 seconds. Before calculating anything, estimate how fast it's going and how far it fell - then check your worked answer against that estimate.
Show the worked approach
- List what you know in words first: released from rest means initial velocity = 0; falling under gravity means acceleration ≈ 9.8 m/s²; time = 2s.
- Make a rough estimate before calculating: a 2-second fall should land somewhere in the tens of metres, and the speed should be in the tens of m/s, not hundreds or single digits.
- Calculate properly: v = u + at = 0 + (9.8 × 2) = 19.6 m/s, and s = ut + ½at² = 0 + (0.5 × 9.8 × 4) = 19.6 m.
- Check the calculated answer against your estimate - both are in the tens, which matches. If your answer had come out as 1,960 m/s, that estimate step is what would have caught the error immediately.
What to focus on: Doing the rough estimate BEFORE the real calculation, not after - checking afterwards is much easier to skip under exam pressure.
Common mistake: Calculating first and only checking the answer's size as an afterthought, if at all - by then it's easy to convince yourself a wrong answer looks fine.
Frequently asked questions
Why do I lose marks on Physics questions even when my final answer is right?
A-Level mark schemes award marks for method, not just the final number - stating the formula used, showing units, and explaining the physical reasoning each earn their own mark. A correct answer with no working can score lower than a wrong answer with the right method clearly shown.
How do I get better at estimating an answer before calculating it?
Practise explicitly: before solving, ask "is this a number in the single digits, hundreds, or thousands, and what unit should it be in?" It feels slow at first. After a few weeks it becomes automatic, and it's the single fastest way to catch a unit-conversion error before it costs you the whole question.
Is this different from just learning more formulae?
Yes - these three habits are about *how* you approach a problem, not what you know. Two students who know the same formulae can get very different marks depending on whether they write down what's known before calculating, sanity-check the size of their answer, and check it makes physical sense.
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