Forces and Motion

Buoyant birds

Stories from Physics for 11-14 14-16 IOP RESOURCES

Diving birds tend to have plumage that traps less air in comparison to non-diving birds as the trapped gas exerts an additional buoyancy force. Hence, diving birds may have thicker feathers than other species to compensate for the poorer insulating properties of their plumage. As birds dive deeper, the trapped air becomes compressed, reducing its volume and also the upward force on the bird, increasing the power available at increased depths.


IOP DOMAINS Physics CPD programme

Energy CPD videos

Our new set of videos gives teachers and coaches of physics a preview of the training we offer ahead of this term's live support sessions.

Find out more