Calculus helps us to study continuous changes such as changes in the Structure of the body.
Calculus help us to calculate the change of certain parameters with respect to another parameter (differential calculus) and summation of the infinitely small region to calculate the area or volume of the object or space (Integral Calculus).
Calculus has various engineering applications. Such as calculating the shear and bending moment of the beam.
In real life, it plays a significant role in the invention of a considerable number of objects.