Knock, Knock
 

I have a knocking sound coming from the front end of my car. It starts at about 10mph and keeps on until I hit the brakes. As I accelerate, the knocking speeds up. When I hit the brakes, it stops. What in the driver side brake system could be knocking? It is not too loud I am just worried that I will break something. I can't hear it over the radio and I can barely feel it in the pedals. Any suggestions would be great. Thanks.
Caymon

your rotors might be warped just enough for the pad to "SLAP" the rotor and it could be making it clunk! either that or your wheel bearing is a little loose and its wobbling your wheel a little bit. jack up the car and give the tire an up and down side to side shake and see if there is excessive play in it.