How to Read a Physics Word Problem
Most physics struggles aren’t about not knowing formulas — they’re about not reading the problem carefully. A consistent reading method fixes 80% of mistakes.
Quick answer
1. Read for context. 2. List givens with units. 3. Draw. 4. Identify what’s asked. 5. Choose the equation. 6. Solve. 7. Check units.
1. Read for the big picture first
What’s happening — a car moving, a ball falling, two objects colliding? Don’t worry about numbers yet.
2. List the givens with units
“A 2-kg ball is dropped from 10 m” → m = 2 kg, h = 10 m, v₀ = 0. Each variable with its unit.
3. Draw
Even a stick figure helps. Label distances, angles, velocities, forces.
4. What’s being asked?
“How fast when it hits the ground?” → solve for v.
5. Choose an equation
v² = v₀² + 2gh connects given (m, h, v₀) and wanted (v).
6. Solve
v² = 0 + 2(9.8)(10) = 196 → v = 14 m/s.
7. Check units
m²/s² → √ → m/s. Correct. If units don’t end up right, wrong equation.
Common mistakes
- Plugging numbers into the first formula that comes to mind.
- Mixing units (km/h with m/s).
- Ignoring direction (vectors need signs).
- Forgetting to draw.