The newton is the unit of force in the International System of Units (SI), defined as the force needed to produce an acceleration of 1 m/s2 on a mass of 1 kg. The newton can be expressed in terms of the fundamental units of mass, length, and time based on Newton's second law of motion. In the centimeter-gram-second system (CGS), the unit of force is the dyne, defined as the force needed to produce an acceleration of 1 cm/s2 on a mass of 1 g. The document provides examples of converting between newtons and dynes.