Which of the following is a derived unit in the SI system?

In the SI system, a derived unit is created by combining base units according to the relationships between different physical quantities. The newton is a prime example of a derived unit because it represents force and is defined as the force required to accelerate a one-kilogram mass by one meter per second squared (1 N = 1 kg·m/s²).

The base units involved here are kilograms (for mass), meters (for distance), and seconds (for time). Since the newton is derived from these fundamental quantities, it is classified as a derived unit.

In contrast, the kelvin, second, and gram are all base units within the SI system. The kelvin is a unit for temperature, the second measures time, and the gram is a unit of mass. Understanding this distinction between base units and derived units is crucial in the field of physics and engineering.