HESI A2 Physics Decoded: Exactly What's on the Section and How to Attack It

Of all the HESI A2 sections, Physics is the one that makes otherwise confident nursing applicants panic. It's understandable — physics feels abstract, math-heavy, and disconnected from patient care. But here's the secret schools don't tell you: the HESI A2 Physics section is shockingly basic when you decode it. It tests first-semester high school physics fundamentals, and the questions map directly onto real nursing tools. Decode the blueprint, memorize a short formula list, and this "scariest section" becomes one of your most winnable.

What the Physics Section Really Covers

The HESI A2 Physics section typically contains around 25 questions, though the exact count can vary by school and form. The content stays consistent, and it's a tight list of seven topic clusters Source:

• Kinematics — motion, speed, velocity, acceleration
• Newton's Laws of Motion — inertia, F = ma, action-reaction
• Friction and rotation — basic force applications
• Work, Energy, and Power — kinetic and potential energy
• Waves and Sound — frequency, wavelength, amplitude
• Light and Optics — reflection, refraction, lenses
• Electricity and Magnetism — charge, Ohm's law, circuits
• Fluid dynamics — density, pressure, buoyancy Source

How Physics Connects to Nursing (Your Motivation Map)

Every physics concept on this exam is a nursing tool in disguise:

• Pressure (P = F/A): blood pressure measurement — literally a pressure reading.
• Waves and sound: ultrasound imaging and how a stethoscope transmits sound.
• Light/optics: how microscopes and X-ray machines work.
• Electricity: electrocardiograms (ECG) and defibrillators run on circuit physics.
• Fluid dynamics: IV drip rates and how fluids move through the body Source

When a question feels pointless, translate it: "this is the physics of a BP cuff" or "this is why ultrasound works." It instantly becomes easier to remember.

The Math You Must Bring Into the Room

Physics on the HESI is arithmetic-light but algebra-required. Before studying any physics concept, make sure you can:

• Rearrange simple formulas (solve for any variable in F = ma)
• Convert units (km → m, hours → seconds)
• Use scientific notation
• Read a word problem and identify the knowns, the unknown, and the missing equation

If algebra feels shaky, spend your first week on these four skills only — they're the real prerequisite for the whole section.

Formulas to Know Cold (No Formula Sheet on Test Day)

Unlike the GED, the HESI A2 does not provide a formula sheet — so this short list is your cheat sheet to memorize:

1. Speed: v = d/t
2. Acceleration: a = Δv/t
3. Newton's 2nd Law: F = ma
4. Work: W = Fd
5. Power: P = W/t
6. Kinetic energy: KE = ½mv²
7. Gravitational potential energy: PE = mgh
8. Ohm's Law: V = IR
9. Density: ρ = m/V
10. Pressure: P = F/A

The Priority-Tier Study Strategy

Don't study all seven clusters equally — the exam doesn't weight them equally:

• Tier 1 (master first): Newton's Laws and kinematics. Nearly every form leads with these, and they're the easiest points.
• Tier 2 (solid): Work/energy/power and waves/sound. Memorize formulas + do 10 practice problems each.
• Tier 3 (familiar): Electricity/magnetism and fluid dynamics. Know definitions, Ohm's law, and density/pressure — don't chase circuit-analysis depth.

In-Exam Tactics That Save Points

• Check your units first. If the answer's units don't match your result, you made a setup error — catch it before you commit.
• Eliminate first, calculate second. Multiple-choice physics rewards recognizing impossible answers (negative mass, speed faster than light).
• Don't over-think constants. You'll never be asked to recall g = 9.8 vs. 10 unless the problem specifies.
• Label your work on scratch paper exactly as you'd label nursing math — order of operations errors are the #1 silent killer.

Conclusion

The HESI A2 Physics section is not a physics degree — it's a vocabulary and formula test wearing a physics costume. Learn the seven topic clusters, memorize the ten formulas, review basic algebra, and drill Tier 1 topics until they're automatic. Do that for two focused weeks, and you'll walk into the section with the kind of quiet confidence that makes the other 90 test questions feel lighter, too. Start tonight: write those ten formulas from memory — then check yourself and drill the ones you missed.

Put it into practice

Choose one idea from this guide and apply it in your next study block. Track what changes, then refine your process based on the evidence—not the feeling of familiarity.