Physics

Problem

A motorbike passes two milestones

A

and

B 100 \mathrm{~m}

apart. Its speeds at

A

and

B

are

10 \mathrm{~m} / \mathrm{s}

and

20 \mathrm{~m} / \mathrm{s}

. Find the speed exactly at the midpoint of the road (not in time) using conceptual reasoning.