The 13th edition is designed for active learning. Here is what sets it apart:

Newton’s law of gravitation, Kepler’s laws, simple harmonic motion (springs, pendulums), and fluid statics/dynamics (Bernoulli’s equation, Pascal’s principle) round out the mechanics section. The 13th edition includes modern astrophysics data (e.g., exoplanet detection via Doppler shifts) and fluid examples from biology (blood flow) and engineering (airfoil lift).