Hammer and feather drop

Drop them in air, in a vacuum and on the Moon.

Interactive

hammer speed0m/s

feather speed0m/s

g here9.8m/s²

Where are we?

Drop height10 mShow snapshots (every 0.2 s)

The math, with your numbers

t = \sqrt{\frac{2h}{g}} = \sqrt{\frac{2 \times 10}{9.8}} = 1.43\ \text{s}

This formula ignores air. Compare it with the real landing times — the hammer is close, the feather is way off.

Try this

Want to know why it behaves like this?

The lesson “Free Fall” explains it step by step: Do heavy things fall faster?

Hammer and feather drop

Drop them in air, in a vacuum and on the Moon.

Hammer and feather drop

Interactive

hammer speed0m/s

feather speed0m/s

g here9.8m/s²

Where are we?

Drop height10 mShow snapshots (every 0.2 s)

The math, with your numbers

t = \sqrt{\frac{2h}{g}} = \sqrt{\frac{2 \times 10}{9.8}} = 1.43\ \text{s}

This formula ignores air. Compare it with the real landing times — the hammer is close, the feather is way off.

Try this

Want to know why it behaves like this?

The lesson “Free Fall” explains it step by step: Do heavy things fall faster?