# Newton's First & Second Laws

Canonical: https://manyspace.aporia.systems/topics/newton-s-first-second-laws-phy-mech1-014
Updated: 2026-10-13

Physics · Classical Mechanics Foundations · PHY-MECH1-014

- Difficulty: 2 / 5
- Importance: 4 / 5
- Study time: 2.5–5 h

inertia, force, mass, F=ma, units

## Why it matters

The first complete physical theory and the template for all others: kinematics, forces, energy and momentum with Newton's laws.

## Where it is used

Vehicle motion, projectile/ballistics, machine design, sports physics, airbags and safety engineering, robotics.

## How you know you have learned it

Solve ≥10 representative problems with ≥80% adjusted accuracy.

## What you need first

- [SI Units & Standards](https://manyspace.aporia.systems/topics/si-units-standards-phy-phytool-001) (required)
- [Intuitive Limits](https://manyspace.aporia.systems/topics/intuitive-limits-mth-calc1-123) (helpful)

## What it opens

- [Newton's Third Law](https://manyspace.aporia.systems/topics/newton-s-third-law-phy-mech1-015)
- [Momentum & Impulse](https://manyspace.aporia.systems/topics/momentum-impulse-phy-mech1-022)

## Resources

- Introduction to Classical Mechanics — David Morin
- University Physics (Young & Freedman) — Young & Freedman
- University Physics (Young & Freedman) — Young & Freedman