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Newer cars have a Power Brake Booster (or Power Disc Brake system). This system adds hydraulic pressure to the brake system, so when you push the brake pedal, it increases the pressure on the brake pads with hydraulic power.
When the car is off, you loose the additional power provided by this hydraulic system. The brakes still work, you just need to push harder. Typically after the engine cuts off, the first time you press the brake it is somewhat normal (hydraulic pressure still in the system) but after that, the pedal becomes harder to press. It is the same concept with Power Steering - you have hydraulic assistance with the engine on, but none with it off (turn the key on without the engine on and turn the wheel - it is possible, just hard).
What else can I help you with?
How a car runs?
gas
Do warped rotors cause car to shake only when giving it gas?
No, warped rotors will cause vibration when braking.
What should you do if a car starts to skid?
Ease off the gas pedal, stop braking, and steer in the direction of the skid.
What is a hybrid car what kind of gas do they use?
A hybrid car is a car that runs on battery and gas. It uses standard unleaded regular gas.
How is energy conserved when a car runs out of gas and stops?
When the car has no gas, no energy is used and no energy is produced.
How can you tell if your car runs out of gas?
it stops working
How do you get your car started after it runs out of gas?
You can't unless you call someone and they will give you gas.
What runs out of gas faster a bus or a car?
It depends on what type of car it is,because a bus moves queit slow if you compare it with a car so, therefore, a car runs out quicker.
How much does a average car cost?
depends on how it runs (eletric ,gas) ,popularity ,and gas mileage
Who invented the first gas powered car?
Actually Julius Hock invented the first car that runs on liquid gas in 1870 by then their were no Mercedes Benz
Why won't car start but lights work?
Because your car runs on gas but your lites run on a battery.
Why would my car slow down if im not braking?
Because you have taken you foot of the accelerator (gas) pedal or there is a blockage of the fuel feed or the air intake to the engine.
