Downhill Rotation Race - Smarter Every Day 13

Two bottles are prepared for a race down an inclined rod: one containing liquid (water) and one containing solid (ice)

Which bottle will reach the bottom first - the ice or the water?

• Ice involves rotational inertia of all the mass of the fluid • Water involves losses due to fluids and will heat up during the race

Viewers must predict the outcome, with incorrect predictions requiring subscription to the channel

The presenter counts down from 3 to initiate the race

Both bottles are released simultaneously down the inclined rod to determine which reaches the bottom first

The race demonstrates the practical effects of rotational inertia and fluid dynamics in real-time

Viewers who made predictions discover whether their understanding of physics was correct