A-Level Physics: A Problem-Solving Framework That Actually Works

A-Level Physics problems can feel overwhelming. You read the question, see a wall of text with unfamiliar context, and freeze. This happens even to students who understand the physics — because understanding concepts and solving exam problems are different skills.

Here's the 5-step framework our tutors use to break down any A-Level physics problem.

The SOLVE Framework

S — Sketch the Situation

Before writing any equations, draw a diagram. This single step eliminates more errors than any other technique.

• For mechanics: draw free body diagrams with all forces labelled
• For circuits: redraw the circuit clearly with current directions
• For waves: sketch the wave pattern with wavelength and amplitude marked
• For fields: draw field lines with direction and relative strength

Rule of thumb: If you can't draw it, you don't understand the question yet.

O — Organize the Given Information

List every piece of information the question provides, converting units as needed:

Given:
  m = 2.5 kg
  u = 0 m/s (starts from rest)
  a = 3.2 m/s²
  t = 4.0 s

Find: s (displacement)

This step catches unit errors (e.g., km vs m, minutes vs seconds) before they propagate through your calculation.

L — Link to Physics Principles

Identify which physics principles apply. Ask yourself:

• Is this a conservation problem? (energy, momentum)
• Is this a Newton's law problem? (F = ma)
• Is this a field problem? (E = F/q, B = F/qv)
• Is this a wave problem? (v = fλ, diffraction, interference)

Write down the relevant equations before plugging in numbers.

V — Verify with Estimation

Before doing the full calculation, estimate the answer:

• Should the answer be big or small?
• Positive or negative?
• What order of magnitude?

This catches calculator errors. If you estimate "a few metres" and your calculation gives 3000 m, something went wrong.

E — Execute and Evaluate

Now do the calculation. After getting your answer:

• Check the units (dimensional analysis)
• Check the sign (does the direction make sense?)
• Check the magnitude (is this physically reasonable?)
• Re-read the question (did you answer what was actually asked?)

Example: Projectile Motion Problem

Question: A ball is thrown horizontally from a cliff 45 m high at 12 m/s. Find the distance from the base of the cliff where it lands.

S — Sketch: [Draw cliff, horizontal velocity arrow, curved trajectory, vertical height]

O — Organize:

Horizontal: ux = 12 m/s, ax = 0
Vertical: uy = 0 m/s, ay = 9.81 m/s², sy = 45 m
Find: sx (horizontal distance)

L — Link: This is a projectile motion problem. Horizontal and vertical motions are independent. Use suvat equations.

V — Verify: Falling 45 m takes roughly 3 seconds (s = ½gt²). At 12 m/s horizontal, that's roughly 36 m. Expect an answer around 36 m.

E — Execute:

• Vertical: 45 = 0 + ½(9.81)t² → t = √(90/9.81) = 3.03 s
• Horizontal: sx = 12 × 3.03 = 36.3 m ✓

The answer (36.3 m) matches our estimate. Units are correct (metres). The answer is physically reasonable.

When the Framework Saves You

The SOLVE framework is most valuable for multi-step problems and unfamiliar contexts. A-Level examiners love disguising standard physics in novel scenarios:

• A bungee jumper (energy conservation + Hooke's law)
• A satellite in orbit (circular motion + gravitational fields)
• A medical ultrasound (wave properties + Doppler effect)

The physics is always the same. The framework helps you see through the disguise.

Common A-Level Physics Exam Mistakes

1. Not drawing diagrams — Loses easy marks and increases error rate
2. Wrong units — Always convert to SI before calculating
3. Ignoring significant figures — Match the precision of given data (usually 2-3 s.f.)
4. Forgetting direction — Velocity, force, and field strength are vectors
5. Not re-reading the question — Many students answer a different question than what was asked