Question

Why do we need a point of reference in describing motion? $\left[3\text{marks}\right]$

Answer 1

$\left[1.5\text{marks}\right]$
Motion is relative concept and a reference point is important in determining motion because in order to say that something is moving there is a need to have something stationary to compare.

$\left[1.5\text{marks}\right]$

A reference point is a place or object used for comparison to determine if something is in motion. An object is in motion if it changes position relative to a reference point.