Why are bullet trains so fast?

I wonder what kind of weapon they use to shoot the bullet train...

They're actually named after the bullet ant, which is reputed to have the most painful sting of all insects. A sting so painful it is compared with being shot...by people who have done both.

Why name a train after the bullet ant? Because when it hits something, it hurts.

I have a masters degree, so I'm an expert.

Thank you for the key!

Simple explanation for those who are wondering:
The bullet trains do not touch the rails, when moving. They do that by using magnets.

By the way, I was too slow to get on the bullet train.