Because the pressure doesn't change when the brake pads wear out.
All that is stopping your vehicle are the actual "pads" that are usually riveted to the "shoe" or disk backing. With most cars having "Power Brakes" now there is little or no effort when pushing the pedal. If it takes longer then usual to stop or you hear a scraping noise every time you use the brakes have them looked at.
You should always have the brakes looked at yearly because if you wear the pads down to the metal backing it will wear a groove into the disk or drum and it will cost you more to have them machined back to a level surface.
If you have an older car and the brake pads/shoes are fine then replace the rubber brake hose going to the brake disk/drum assembly. The rubber will usually swell or have contaminates, rust, etc, that will accumulate inside and actually block the passage. That's usually the #1 problems with brake issues on old VW Bugs. You should also clean out all the slave cylinders , metal brakes lines and master cylinders also.
Your brake pedal feels soft, one reason for this could be
Your brake pedal feels soft, one reason for this could be
air in the brake lines theyneed bleed
The brake pedal vibrates.
Usually when a brake pedal feels more stiff than usual, there is a vacuum leak. The brake lines probably should be bled.
Could be low on fluid, or your shoes are worn. See a mechanic
Disc brake rotor? A pulsation in the brake pedal when applied. Distributor ignition rotor? The engine may not run or run poorly with misfires.
This is not normal. If your car is doing this, get it checked out.
I think you have air in the brake lines.
Yes, you will feel the brake pulsate. Just keep full steady pressure on the pedal and steer around the accident if possible.
It sounds like you still have a little air in the brake lines. You probably need to bleed them again. Or you have the pads installed improperly.
It probably means that you need to visit a mechanic. Soft brake pedal feel can mean that air has gotten into the fluid lines. There could be other issues like worn-out pads or rotors.