Brake is a noun for the mechanism you use to stop the wheels of your car when you reach a stop light. Break is a verb that means to cause something solid to come apart into multiple pieces, as when you drop a glass on the floor and it "breaks" into many pieces. It also has other similar verb meanings. Break can also be a noun for when you take some time out from another activity. For instance we might take a 15 minute break from work to make a ihone call.

Both Hatef and Mayu are correct in their definitions of what "break" and "brake" mean. However historically your friend is correct, there is a connection. Trains, when they first came into use, had a habit of uncoupling the carriages attached to them, which was highly dangerous. The solution was to attach a special carriage at the end, called the "Brake Van", note the spelling of "Brake". If coaches became uncoupled this was called a "break", with the different spelling. The "Brake Van", is such circumstances was able to stop the carriages still attached to it and the Engine was able to stop the carriages still attached to it. Both had "Brakes" Why there is a difference is spelling I have not idea though.

Thank you all very much. :)

Brake is also a tool used in a factory to bend metal. Your probably not going to use that outside of a factory or sheet metal shop. Break is when we go to for a short time off work. Usually 15 minutes every 4 hour and called "break time" or just "break"

Naa not really the same words, (to) brake is to, for example, de-accelerate your car to make it go slower. (To) Break is, for example, having a break from work, or crashing the mentioned car into a wall. Because of no brakes, maybe. But the pronounciation is the same. Hope this helped.