Question

Define reference point

place or object used for comparison to determine if something is in motion
place or object that is in motion

Answer 1

$\large\bf{\underline\orange{Answer \:↝}}$

A reference point in physics is a point in space, regardless of the type of geometry that you are using that stays still and does not move. ... A fixed point with respect to which a body changes its position is called referance point or origin.