Most cars are Steel (sheet metal) Some are Aluminum. Corvettes are Fiberglass, Some saturns had steel with plastic skins on the doors and the ultimate DeLorean was Stainless steel.
A car fender
The same material as your car or mine.
Polypropylene
The fender of the car is located on the front sides of the car. The fenders sit right above the tires.
It will be made of many components the casing material will not matter much.
'The fender on my car got smashed in the wreck I was in.'
Sheet Steel
Either by volumetric compressions, which are based on the material's bulk modulus, or shear stress (think of a multi-car fender-bender where the first car hits the second, hits the third, etc.) which is based on the material's shear modulus.
A car chassis is made of heavy boxed steel, stamped steel or aluminum.
Safety glass, same as your car or mine.
Usually steel.
yes