R. Feynman wrote in his lecture (The Feynman Lectures on Physics: Chapter-9)
"Weight and inertia are proportional, and on the earth’s surface are often taken to be numerically equal, which causes a certain confusion to the student. On Mars, weights would be different but the amount of force needed to overcome inertia would be the same."
I am not able to understand how weight and inertia are related because everywhere on internet, everyone is only showing the relation between inertia and mass.
So, is their any relation between them(if so please explain...) or is he wrong in his statement.