no.
YES-IF IT has a vaccume booster & not Hydro or air brakes
This grossly unsafe. If you have just the booster fail the brakes will still work but not well. If the brakes fail completely you could crash and die.
no power brakes....harder to stop
Is stepping on the brakes of a car acceleration. That would be deceleration.
from the brake booster
You probably have air in the lines or the brake booster is losing vacuum. Have the brakes bleed and have someone put a vacuum gauge on the booster,
If you have a power brake booster then there will be a vaccum line that runs to the brake booster on the firewall from the carburator. Check the booster for holes and broken fittings or buy a new booster. if no brake booster then brakes shouldn't affect vaccum
Power booster failure or vacuum supply to booster failure.
The brake booster is part of the power brake system.
The power brake booster is leaking vacuum and that makes the engine die when the brakes are applied. Replace brake booster.
Brakes
yes