Newton's First Law of Motion

An object remains at rest or in uniform motion unless acted upon by a net force.

Core Principles & Analysis

• Known as the law of inertia, building on Galileo's earlier rolling-ball experiments.
• Defines the inertial reference frames in which the other two laws hold.
• Explains why unrestrained passengers lurch forward when a vehicle brakes suddenly.

Specifications & Metrics

• SYMBOL: ∑F=0