What is the SI unit of mass?

The SI unit of mass is the kilogram (kg). It is one of the seven base units in the International System of Units (SI). The kilogram is important because it provides a standard for measuring mass, which is essential for consistency in scientific research, industry, and commerce. In the NCERT syllabus, it is emphasized that having a standard unit like the kilogram helps in maintaining uniformity and accuracy in measurements across different fields.