It

[wowenglish1]

I would like to know the difference in the meaning between "It(1)" and "It(2)".
1. It is fun to ride a bike.
2. It took me one hour to get here.

[bhaisahab]

I would like to know the difference in the meaning between "It(1)" and "It(2)".
1. It is fun to ride a bike.
2. It took me one hour to get here.

There is no difference in meaning.

[mmasny]

If you want some further reading there's a little bit here:
Dummy pronoun - Wikipedia, the free encyclopedia