Free fall

Let an object fall for a chosen time and see the distance fallen and its speed, ignoring air resistance.

Works in metric or imperial units.

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Questions students ask

Do heavy objects fall faster?

Not without air resistance: all objects accelerate at g. Galileo is said to have shown it; Apollo 15 dropped a hammer and a feather on the Moon.

What formula does it use?

t = √(2h/g); v = √(2gh).

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