Will my iphone work faster if I reset all the contents and media files?

Ok, so my iPhone 3g is kind of having some trouble. It's like everything works in a SLOW-MO and it sucks. I just wanted to know if my iphone will work faster like a brand new one if I reset it. If not, then any other way?

No it will not move faster if you delete file. What you need to do is free up the RAM in other words, constantly close the programs that you are not using.
The only other way for your iphone to move faster is to get a New Iphone… 4 and upwards.
the Iphone 3g and 3gs has about 512MB RAM or less.that's hardly enough for today needs.

You can close open apps that you don't need to use often

If you double click your home button and hold down recent apps and hit the minus button it turns off your app. This makes your phone run faster.

Also sync it, some bugs could be wiped out if you have any.