Car Design And Safety Flashcards
Brakes work against what?
Kinetic energy of the car.
What is done when you apply the brakes to slow down a car?
Work is done.
Breaks reduce what? by doing what?
Kinetic energy.
By transferring it into heat(and sound energy).
What cars make the use of energy?
New regenerative breaking systems used in electric or hybrid cars.
Regenerative brakes use the system that…
Drives the vehicle to do the majority of the breaking.
Rather then converting kinetic energy into heat energy what do regenerative brakes do?
Put vehicles motor in reverse.
Motor running backwards and wheels are slowed.
At the same time, the motor acts as an…
Electric generator, converting kinetic energy into electrical energy that is stored as chemical energy.
Where is the chemical energy stored?
Vehicles battery.
What is the advantage of regenerative brakes?
Store the energy of braking rather than wasting it.
Cars are designed to convert kinetic energy…
Safely in a crash.
If a car crashes it will ___ ____ very quickly.
Slow down.
When a car crashes what is converted?
A lot of kinetic energy is converted into other forms of energy in a short space of time.
In a crash, there’ll be a big…
Change in momentum over a very short time.
People inside feel huge forces.
Cars often do what to lessen the force on the passengers?
Increase the time over which momentum changes happen.
What are crumple zones?
Front and back of the car.
Crumple up on impact.
