Yes.
If the pedal is stuck down, no vacuum to the release diaphragm on the pedal
sounds like a frozen wheel cylinder to me.
By pressing the break pedal down
slave cylinder
Fault with clutch master cylinder.
You are probably losing both brake fluid and pressure through either a wheel cylinder or the Master cylinder . You will need to have a trained mechanic look at why you are having the loss of a brake pedal .
Sounds like u need a new master cylinder, dont mess around with breaks, its better to be safe then sorry. When a master cylinder wears out it no longer holds the pressure and will cause the pedal to go to the floor. Also check your brake fluid level, if it is going down u may have a leak. Have your breaks looked at asap.
master cylinder is bad or you have a leak
Start the engine. Place you foot on the brake pedal, and press fairly hard and hold the pedal down. If the pedal very slowly, moves toward the floor any at all, the master cylinder is defective. Replace it immediately!!!!!
clamp the line to the slave cylinder and mash the clutch pedal. if the pedal gets hard to push,the slave is bad. if the clutch pedal goes down slowly with moderate pressure,the master cyl is bad clamp the line going to the slave cylinder. meant to say that in the previous answer
Letting go of the pedal or pushing the gas pedal.
Operates the brakes when the pedal is pressed. The pedal pushes the master cylinder, this pushes brake fluid down the brake lines, the fluid pushes the piston(s) in the wheel cylinder, the pistons push the pads or shoes onto the drum or rotor which is attached to the wheel.