Hi,(adsbygoogle = window.adsbygoogle || []).push({});

Some time back I was saw a discovery documentary, can't remember the name, but in that somewhere they told that under free fall if possible to centre of earth, it will take around 32 Hrs or so.. No calculations or details were given.

So I wonder will it take so much time or how they came to that calculation, they might be wrong ..

So my question is how much time will it take to reach the centre of earth. Following assumptions are taken into account:

1) Person weight : 60 KG

2) Waist diameter : 34 cm ( to determine the cross section if required )

3) Air drag or friction has to be taken into account

4) We know that g ( 9.8 m/s 2 ) reduces towards we approach the centre of earth. The graph is linear. So if possible this can be accounted.

5) Radius of earth : 6300 KM

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Time taken to free fall to centre of earth - if allowed?

**Physics Forums | Science Articles, Homework Help, Discussion**