Physics of Cricket
Lesson 1 of 6

Magnus Force — Why Spin Curves

6 min read•3/19 sections

The sideways that makes googlies and possible.

Example: Shane Warne's generated ~2,200 — enough Magnus to move the ball 60 cm sideways in the air.

Applies to: Every spin ball, plus when the angles airflow asymmetrically.

Technical Breakdown

19-section schema

Definition

The Magnus is the sideways push a spinning ball feels as it flies through air — it's why a drifts and a football banana-kicks.

History

Finger- and wrist-spin have been part of cricket since the 18th century; -arm spin was legalised in 1864, and the ICC's 15° flex tolerance (2005) modernised its regulation.

Physics Involved

One side of the spinning ball drags air faster than the other, creating a . scales with spin rate (), speed and air density.

Famous Players

Drills → real performances

Shane Warne

1992–2007

Right-arm leg-spinner (Australia)

Shane Warne (Right-arm leg-spinner for Australia, 1992–2007). Best known for: Gatting Ball, 708 wickets. His 1993 'Ball of the Century' to Mike Gatting at Old Trafford pitched well outside leg and spun across to clip off-stump — the gold-standard .

Gatting Ball, 708 Test wickets

David Warner

1992–2007

Right-arm leg-spinner (Australia)

David Warner — Opening batter for Australia, active 2009–2024.