Jets & Draining

Torricelli’s law

An interactive lesson with 7 steps, about 6 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• Torricelli: outflow speed $v = \sqrt{2gd}$.
• Jets slow as the tank drains, because the depth falls.
• Flow rate = hole area × speed.

Steps

1. Speed from height
2. A leaky barrel
3. The longest jet
4. Slowing down
5. Watching a tank drain
6. Half the height
7. Flow rate