Complete 2026 Mastery Guide for ASU PHY 111

ASU PHY 111: GENERAL PHYSICS I
Mechanics, Forces, and Energy - Complete Study Guide (2026)
Institution: Arizona State University (ASU)

Course Code: PHY 111 Course Name: General Physics I


PART 1: KINEMATICS (MOTION)
1. The Three Equations of Constant Acceleration
1. Velocity: v = v_0 + at
2. Position: \Delta x = v_0t + \frac{1}{2}at^2
3. No-Time Equation: v^2 = v_0^2 + 2a\Delta x


2. Projectile Motion Components
• Horizontal (x): Always constant velocity (a=0). Formula: x = v_xt.
• Vertical (y): Acceleration is always gravity (-9.8 \, m/s^2).
• The Link: Time (t) is the same for both x and y directions.


PART 2: NEWTON’S LAWS & DYNAMICS
1. The Laws of Motion

• Law 1 (Inertia): Objects stay in motion unless a net force acts.
• Law 2 (F=ma): Force equals mass times acceleration.
• Law 3 (Action/Reaction): Forces come in equal and opposite pairs.

2. Friction & Inclines

• Friction Formula: f = \mu N
• On a Slope: * Force pulling down the slope: mg \sin(\theta)
• Normal Force: mg \cos(\theta)


PART 3: ENERGY & WORK
• Work (W): Force \times Distance \times \cos(\theta).
• Kinetic Energy (K): \frac{1}{2}mv^2 (Energy of motion).
• Potential Energy (U): mgh (Stored energy based on height).
• Conservation: K_i + U_i = K_f + U_f (In a system with no friction).