Take the keys out of the ignition.
9 ft
It takes less force to stop a train than to stop a car.
10 ft
You have to change the gear. It won't do it by itself.
The brake light switch is broken or out of adjustment. Park the car and pull the fuse to keep the battery from draining dead until you can get it fixed.
Ask this question again specifying what the car is.
Apply the brakes until you have come to a complete stop then shift the selector into park and set the parking brake.
Absolutely never turn off the engine when you are in a driving lane on any roadway. A stop sign means stop, not park.
15 feet
You park in the basement car park.
Don't forget also that many cars require you to have your foot on the brake before it will let you take it out of park....
It shouldn't ...