“So there you have it. The maths equation that tells you how much a football will curl based on how hard you hit it and how much ‘whip’ you give it. Footballers often get a bad reputation for perhaps not being the brightest bunch, but every time they step up to take a free kick or a penalty they are pretty much doing this calculation in their head. Maybe they’re not quite so bad after all…”

The Penalty Kick Equation

A picture speaks a thousand words by @CambridgeMaths

https://classteaching.wordpress.com/2017/11/20/effective-cpd-subject-planning-and-development-sessions-in-maths/