physics Ernst Mach’s

Paper instructions:

explaining how Ernst Mach’s  definition of mass as discussed in lecture differs from the definition

provided   by the textbook on pages 104-107.

Essay
We have introduced the concept of inertia and named the measure of inertia
mass. Write an approximately 1 page essay explaining how Ernst Mach’s
definition of mass as discussed in lecture differs from the definition provided
by the textbook on pages 104-107. What assumptions go into each definition?
In your opinion which definition is more fundamental and which is more
appealing? In addition to the structure of your argument, writing skills
(grammar, spelling, word choice, etc.) count in this answer.

Ernst Mach’s
definition of mass discussed in lecture:-
Inertia – property of matter that resist change in motion
Inertia is a measured mass
Ernst Mach’s definition
Is basically collisions and measurements of v ?  ? and (?v ? ) ?
Relates to newton’s 3rd law
For pairs of objects
Can measure (?v ? ) ? for each object
Still need an arbitrary unit of mass