Volumes of Revolution (AQA A-Level Further Maths): Flashcards

📚Flashcards
Volumes of Revolution
Sign up to keep revising.Create a free account to study more flashcards and track your progress.

Practise the cards

10 cards from this deck

Show

Vol. formula: Rotate y=f(x)y=f(x) about x-axis

V=∫abπy2 dxV = \int_a^b \pi y^2 \, dx

Vol. formula: Rotate x=f(y)x=f(y) about y-axis

V=∫abπx2 dyV = \int_a^b \pi x^2 \, dy

Rotate about x-axis → square which variable?

Square the yy

Rotate about y-axis → square which variable?

Square the xx

2π radians in degrees

360° (full turn)

180° rotation volume (vs 360°)

Half the volume

90° rotation volume (vs 360°)

One quarter the volume

Before y-axis rotation, rearrange equation to...

x=f(y)x = f(y) form

Cross-section perpendicular to rotation axis

Circle (circular disc)

Cone volume formula

V=13πr2hV = \frac{1}{3}\pi r^2 h

Join 100,000+ A-Level students studying Flashcards with us.

Select your subjects, and get access to A+ resources today.